Finding the Fourth Proportional to 124,978.55, 172,469.91 and 67,617.68

Step by Step Solution

1. Step 1: Write the proportion equation
   124,978.55 : 172,469.91 = 67,617.68 : x
2. Step 2: Convert to fraction form
   124,978.55/172,469.91 = 67,617.68/x
3. Step 3: Cross multiply
   124,978.55x = 172,469.91 × 67,617.68
4. Step 4: Simplify right side
   124,978.55x = 11,662,014,321.66
5. Step 5: Solve for x
   x = 11,662,014,321.66/124,978.55
6. Step 6: Final answer
   x = 93,312.13