Finding the Fourth Proportional to 2,639,640.72, 3,642,704.28 and 1,432,416.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,639,640.72 : 3,642,704.28 = 1,432,416.72 : x
2. Step 2: Convert to fraction form
   2,639,640.72/3,642,704.28 = 1,432,416.72/x
3. Step 3: Cross multiply
   2,639,640.72x = 3,642,704.28 × 1,432,416.72
4. Step 4: Simplify right side
   2,639,640.72x = 5,217,870,516,687.56
5. Step 5: Solve for x
   x = 5,217,870,516,687.56/2,639,640.72
6. Step 6: Final answer
   x = 1,976,735.12