Finding the Fourth Proportional to 1,123,272.77, 1,549,935.41 and 639,847.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123,272.77 : 1,549,935.41 = 639,847.35 : x
2. Step 2: Convert to fraction form
   1,123,272.77/1,549,935.41 = 639,847.35/x
3. Step 3: Cross multiply
   1,123,272.77x = 1,549,935.41 × 639,847.35
4. Step 4: Simplify right side
   1,123,272.77x = 991,722,061,560.43
5. Step 5: Solve for x
   x = 991,722,061,560.43/1,123,272.77
6. Step 6: Final answer
   x = 882,886.23