Finding the Fourth Proportional to 81,731.52, 112,789.59 and 45,921.51

Step by Step Solution

1. Step 1: Write the proportion equation
   81,731.52 : 112,789.59 = 45,921.51 : x
2. Step 2: Convert to fraction form
   81,731.52/112,789.59 = 45,921.51/x
3. Step 3: Cross multiply
   81,731.52x = 112,789.59 × 45,921.51
4. Step 4: Simplify right side
   81,731.52x = 5,179,468,285.08
5. Step 5: Solve for x
   x = 5,179,468,285.08/81,731.52
6. Step 6: Final answer
   x = 63,371.74