Finding the Fourth Proportional to 124,735.16, 172,085.67 and 76,905.47

Step by Step Solution

1. Step 1: Write the proportion equation
   124,735.16 : 172,085.67 = 76,905.47 : x
2. Step 2: Convert to fraction form
   124,735.16/172,085.67 = 76,905.47/x
3. Step 3: Cross multiply
   124,735.16x = 172,085.67 × 76,905.47
4. Step 4: Simplify right side
   124,735.16x = 13,234,329,761.83
5. Step 5: Solve for x
   x = 13,234,329,761.83/124,735.16
6. Step 6: Final answer
   x = 106,099.43