Finding the Fourth Proportional to 120,057.92, 180,108.72 and 60,117.76

Step by Step Solution

1. Step 1: Write the proportion equation
   120,057.92 : 180,108.72 = 60,117.76 : x
2. Step 2: Convert to fraction form
   120,057.92/180,108.72 = 60,117.76/x
3. Step 3: Cross multiply
   120,057.92x = 180,108.72 × 60,117.76
4. Step 4: Simplify right side
   120,057.92x = 10,827,732,802.87
5. Step 5: Solve for x
   x = 10,827,732,802.87/120,057.92
6. Step 6: Final answer
   x = 90,187.58