Finding the Fourth Proportional to 81,115.59, 111,938.31 and 45,306.10

Step by Step Solution

1. Step 1: Write the proportion equation
   81,115.59 : 111,938.31 = 45,306.10 : x
2. Step 2: Convert to fraction form
   81,115.59/111,938.31 = 45,306.10/x
3. Step 3: Cross multiply
   81,115.59x = 111,938.31 × 45,306.10
4. Step 4: Simplify right side
   81,115.59x = 5,071,488,266.69
5. Step 5: Solve for x
   x = 5,071,488,266.69/81,115.59
6. Step 6: Final answer
   x = 62,521.75