Finding the Fourth Proportional to 1,123,370.82, 1,550,142.09 and 639,898.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123,370.82 : 1,550,142.09 = 639,898.02 : x
2. Step 2: Convert to fraction form
   1,123,370.82/1,550,142.09 = 639,898.02/x
3. Step 3: Cross multiply
   1,123,370.82x = 1,550,142.09 × 639,898.02
4. Step 4: Simplify right side
   1,123,370.82x = 991,932,854,109.66
5. Step 5: Solve for x
   x = 991,932,854,109.66/1,123,370.82
6. Step 6: Final answer
   x = 882,996.81