Finding the Fourth Proportional to 1,123,168.14, 1,549,792.85 and 639,742.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123,168.14 : 1,549,792.85 = 639,742.73 : x
2. Step 2: Convert to fraction form
   1,123,168.14/1,549,792.85 = 639,742.73/x
3. Step 3: Cross multiply
   1,123,168.14x = 1,549,792.85 × 639,742.73
4. Step 4: Simplify right side
   1,123,168.14x = 991,468,697,845.80
5. Step 5: Solve for x
   x = 991,468,697,845.80/1,123,168.14
6. Step 6: Final answer
   x = 882,742.90