Finding the Fourth Proportional to 658,294.56, 987,434.52 and 209,003.34

Step by Step Solution

1. Step 1: Write the proportion equation
   658,294.56 : 987,434.52 = 209,003.34 : x
2. Step 2: Convert to fraction form
   658,294.56/987,434.52 = 209,003.34/x
3. Step 3: Cross multiply
   658,294.56x = 987,434.52 × 209,003.34
4. Step 4: Simplify right side
   658,294.56x = 206,377,112,711.30
5. Step 5: Solve for x
   x = 206,377,112,711.30/658,294.56
6. Step 6: Final answer
   x = 313,502.69