Finding the Fourth Proportional to 1,123,661.59, 1,550,273.13 and 639,883.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123,661.59 : 1,550,273.13 = 639,883.69 : x
2. Step 2: Convert to fraction form
   1,123,661.59/1,550,273.13 = 639,883.69/x
3. Step 3: Cross multiply
   1,123,661.59x = 1,550,273.13 × 639,883.69
4. Step 4: Simplify right side
   1,123,661.59x = 991,994,490,932.25
5. Step 5: Solve for x
   x = 991,994,490,932.25/1,123,661.59
6. Step 6: Final answer
   x = 882,823.17