Finding the Fourth Proportional to 308,485.95, 425,732.31 and 172,532.55

Step by Step Solution

1. Step 1: Write the proportion equation
   308,485.95 : 425,732.31 = 172,532.55 : x
2. Step 2: Convert to fraction form
   308,485.95/425,732.31 = 172,532.55/x
3. Step 3: Cross multiply
   308,485.95x = 425,732.31 × 172,532.55
4. Step 4: Simplify right side
   308,485.95x = 73,452,681,061.69
5. Step 5: Solve for x
   x = 73,452,681,061.69/308,485.95
6. Step 6: Final answer
   x = 238,107.05