Finding the Fourth Proportional to 658,636.72, 908,922.42 and 356,830.72

Step by Step Solution

1. Step 1: Write the proportion equation
   658,636.72 : 908,922.42 = 356,830.72 : x
2. Step 2: Convert to fraction form
   658,636.72/908,922.42 = 356,830.72/x
3. Step 3: Cross multiply
   658,636.72x = 908,922.42 × 356,830.72
4. Step 4: Simplify right side
   658,636.72x = 324,331,441,552.74
5. Step 5: Solve for x
   x = 324,331,441,552.74/658,636.72
6. Step 6: Final answer
   x = 492,428.42