Finding the Fourth Proportional to 81,111.28, 121,625.38 and 43,182.10

Step by Step Solution

1. Step 1: Write the proportion equation
   81,111.28 : 121,625.38 = 43,182.10 : x
2. Step 2: Convert to fraction form
   81,111.28/121,625.38 = 43,182.10/x
3. Step 3: Cross multiply
   81,111.28x = 121,625.38 × 43,182.10
4. Step 4: Simplify right side
   81,111.28x = 5,252,039,321.70
5. Step 5: Solve for x
   x = 5,252,039,321.70/81,111.28
6. Step 6: Final answer
   x = 64,751.03