Finding the Fourth Proportional to 81,057.48, 111,848.18 and 45,242.88

Step by Step Solution

1. Step 1: Write the proportion equation
   81,057.48 : 111,848.18 = 45,242.88 : x
2. Step 2: Convert to fraction form
   81,057.48/111,848.18 = 45,242.88/x
3. Step 3: Cross multiply
   81,057.48x = 111,848.18 × 45,242.88
4. Step 4: Simplify right side
   81,057.48x = 5,060,333,785.96
5. Step 5: Solve for x
   x = 5,060,333,785.96/81,057.48
6. Step 6: Final answer
   x = 62,428.96