Finding the Fourth Proportional to 105,635.38, 145,780.37 and 57,888.31

Step by Step Solution

1. Step 1: Write the proportion equation
   105,635.38 : 145,780.37 = 57,888.31 : x
2. Step 2: Convert to fraction form
   105,635.38/145,780.37 = 57,888.31/x
3. Step 3: Cross multiply
   105,635.38x = 145,780.37 × 57,888.31
4. Step 4: Simplify right side
   105,635.38x = 8,438,979,250.47
5. Step 5: Solve for x
   x = 8,438,979,250.47/105,635.38
6. Step 6: Final answer
   x = 79,887.81