Finding the Fourth Proportional to 1,391,443.28, 2,087,865.24 and 1,037,168.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,391,443.28 : 2,087,865.24 = 1,037,168.72 : x
2. Step 2: Convert to fraction form
   1,391,443.28/2,087,865.24 = 1,037,168.72/x
3. Step 3: Cross multiply
   1,391,443.28x = 2,087,865.24 × 1,037,168.72
4. Step 4: Simplify right side
   1,391,443.28x = 2,165,468,518,503.29
5. Step 5: Solve for x
   x = 2,165,468,518,503.29/1,391,443.28
6. Step 6: Final answer
   x = 1,556,275.09