Finding the Fourth Proportional to 76,149.72, 105,039.18 and 54,960.12

Step by Step Solution

1. Step 1: Write the proportion equation
   76,149.72 : 105,039.18 = 54,960.12 : x
2. Step 2: Convert to fraction form
   76,149.72/105,039.18 = 54,960.12/x
3. Step 3: Cross multiply
   76,149.72x = 105,039.18 × 54,960.12
4. Step 4: Simplify right side
   76,149.72x = 5,772,965,937.50
5. Step 5: Solve for x
   x = 5,772,965,937.50/76,149.72
6. Step 6: Final answer
   x = 75,810.73