Finding the Fourth Proportional to 1,123,654.08, 1,550,262.79 and 639,876.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123,654.08 : 1,550,262.79 = 639,876.18 : x
2. Step 2: Convert to fraction form
   1,123,654.08/1,550,262.79 = 639,876.18/x
3. Step 3: Cross multiply
   1,123,654.08x = 1,550,262.79 × 639,876.18
4. Step 4: Simplify right side
   1,123,654.08x = 991,976,232,061.34
5. Step 5: Solve for x
   x = 991,976,232,061.34/1,123,654.08
6. Step 6: Final answer
   x = 882,812.82