Finding the Fourth Proportional to 399,915.69, 551,890.22 and 238,784.82

Step by Step Solution

1. Step 1: Write the proportion equation
   399,915.69 : 551,890.22 = 238,784.82 : x
2. Step 2: Convert to fraction form
   399,915.69/551,890.22 = 238,784.82/x
3. Step 3: Cross multiply
   399,915.69x = 551,890.22 × 238,784.82
4. Step 4: Simplify right side
   399,915.69x = 131,783,006,842.46
5. Step 5: Solve for x
   x = 131,783,006,842.46/399,915.69
6. Step 6: Final answer
   x = 329,526.97