Finding the Fourth Proportional to 81,116.70, 111,945.42 and 45,307.50

Step by Step Solution

1. Step 1: Write the proportion equation
   81,116.70 : 111,945.42 = 45,307.50 : x
2. Step 2: Convert to fraction form
   81,116.70/111,945.42 = 45,307.50/x
3. Step 3: Cross multiply
   81,116.70x = 111,945.42 × 45,307.50
4. Step 4: Simplify right side
   81,116.70x = 5,071,967,116.65
5. Step 5: Solve for x
   x = 5,071,967,116.65/81,116.70
6. Step 6: Final answer
   x = 62,526.79