Finding the Fourth Proportional to 124,980.72, 172,446.72 and 74,009.46

Step by Step Solution

1. Step 1: Write the proportion equation
   124,980.72 : 172,446.72 = 74,009.46 : x
2. Step 2: Convert to fraction form
   124,980.72/172,446.72 = 74,009.46/x
3. Step 3: Cross multiply
   124,980.72x = 172,446.72 × 74,009.46
4. Step 4: Simplify right side
   124,980.72x = 12,762,688,625.97
5. Step 5: Solve for x
   x = 12,762,688,625.97/124,980.72
6. Step 6: Final answer
   x = 102,117.26