Finding the Fourth Proportional to 54,043.31, 81,239.31 and 50,112.78

Step by Step Solution

1. Step 1: Write the proportion equation
   54,043.31 : 81,239.31 = 50,112.78 : x
2. Step 2: Convert to fraction form
   54,043.31/81,239.31 = 50,112.78/x
3. Step 3: Cross multiply
   54,043.31x = 81,239.31 × 50,112.78
4. Step 4: Simplify right side
   54,043.31x = 4,071,127,669.38
5. Step 5: Solve for x
   x = 4,071,127,669.38/54,043.31
6. Step 6: Final answer
   x = 75,330.84