Finding the Fourth Proportional to 3,990,864.72, 5,507,384.76 and 2,180,028.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,990,864.72 : 5,507,384.76 = 2,180,028.72 : x
2. Step 2: Convert to fraction form
   3,990,864.72/5,507,384.76 = 2,180,028.72/x
3. Step 3: Cross multiply
   3,990,864.72x = 5,507,384.76 × 2,180,028.72
4. Step 4: Simplify right side
   3,990,864.72x = 12,006,256,948,890.31
5. Step 5: Solve for x
   x = 12,006,256,948,890.31/3,990,864.72
6. Step 6: Final answer
   x = 3,008,434.96