Finding the Fourth Proportional to 81,115.68, 111,932.34 and 45,300.72

Step by Step Solution

1. Step 1: Write the proportion equation
   81,115.68 : 111,932.34 = 45,300.72 : x
2. Step 2: Convert to fraction form
   81,115.68/111,932.34 = 45,300.72/x
3. Step 3: Cross multiply
   81,115.68x = 111,932.34 × 45,300.72
4. Step 4: Simplify right side
   81,115.68x = 5,070,615,593.28
5. Step 5: Solve for x
   x = 5,070,615,593.28/81,115.68
6. Step 6: Final answer
   x = 62,510.92