Finding the Fourth Proportional to 424,255.30, 636,368.55 and 108,715.30

Step by Step Solution

1. Step 1: Write the proportion equation
   424,255.30 : 636,368.55 = 108,715.30 : x
2. Step 2: Convert to fraction form
   424,255.30/636,368.55 = 108,715.30/x
3. Step 3: Cross multiply
   424,255.30x = 636,368.55 × 108,715.30
4. Step 4: Simplify right side
   424,255.30x = 69,182,997,823.82
5. Step 5: Solve for x
   x = 69,182,997,823.82/424,255.30
6. Step 6: Final answer
   x = 163,069.26