Finding the Fourth Proportional to 55,146.72, 76,103.92 and 31,268.80

Step by Step Solution

1. Step 1: Write the proportion equation
   55,146.72 : 76,103.92 = 31,268.80 : x
2. Step 2: Convert to fraction form
   55,146.72/76,103.92 = 31,268.80/x
3. Step 3: Cross multiply
   55,146.72x = 76,103.92 × 31,268.80
4. Step 4: Simplify right side
   55,146.72x = 2,379,678,253.70
5. Step 5: Solve for x
   x = 2,379,678,253.70/55,146.72
6. Step 6: Final answer
   x = 43,151.76