Finding the Fourth Proportional to 664,404.98, 916,758.15 and 392,517.14

Step by Step Solution

1. Step 1: Write the proportion equation
   664,404.98 : 916,758.15 = 392,517.14 : x
2. Step 2: Convert to fraction form
   664,404.98/916,758.15 = 392,517.14/x
3. Step 3: Cross multiply
   664,404.98x = 916,758.15 × 392,517.14
4. Step 4: Simplify right side
   664,404.98x = 359,843,287,109.69
5. Step 5: Solve for x
   x = 359,843,287,109.69/664,404.98
6. Step 6: Final answer
   x = 541,602.33