Finding the Fourth Proportional to 81,082.29, 121,698.18 and 41,129.31

Step by Step Solution

1. Step 1: Write the proportion equation
   81,082.29 : 121,698.18 = 41,129.31 : x
2. Step 2: Convert to fraction form
   81,082.29/121,698.18 = 41,129.31/x
3. Step 3: Cross multiply
   81,082.29x = 121,698.18 × 41,129.31
4. Step 4: Simplify right side
   81,082.29x = 5,005,362,171.66
5. Step 5: Solve for x
   x = 5,005,362,171.66/81,082.29
6. Step 6: Final answer
   x = 61,731.88