Finding the Fourth Proportional to 81,010.52, 111,815.04 and 48,340.10

Step by Step Solution

1. Step 1: Write the proportion equation
   81,010.52 : 111,815.04 = 48,340.10 : x
2. Step 2: Convert to fraction form
   81,010.52/111,815.04 = 48,340.10/x
3. Step 3: Cross multiply
   81,010.52x = 111,815.04 × 48,340.10
4. Step 4: Simplify right side
   81,010.52x = 5,405,150,215.10
5. Step 5: Solve for x
   x = 5,405,150,215.10/81,010.52
6. Step 6: Final answer
   x = 66,721.58