Finding the Fourth Proportional to 2,581,639,041.72, 3,864,442,513.18 and 1,398,280,416.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,581,639,041.72 : 3,864,442,513.18 = 1,398,280,416.78 : x
2. Step 2: Convert to fraction form
   2,581,639,041.72/3,864,442,513.18 = 1,398,280,416.78/x
3. Step 3: Cross multiply
   2,581,639,041.72x = 3,864,442,513.18 × 1,398,280,416.78
4. Step 4: Simplify right side
   2,581,639,041.72x = 5,403,574,287,951,680,512
5. Step 5: Solve for x
   x = 5,403,574,287,951,680,512/2,581,639,041.72
6. Step 6: Final answer
   x = 2,093,078,931.88