Finding the Fourth Proportional to 80,809.31, 121,080.31 and 41,312.09

Step by Step Solution

1. Step 1: Write the proportion equation
   80,809.31 : 121,080.31 = 41,312.09 : x
2. Step 2: Convert to fraction form
   80,809.31/121,080.31 = 41,312.09/x
3. Step 3: Cross multiply
   80,809.31x = 121,080.31 × 41,312.09
4. Step 4: Simplify right side
   80,809.31x = 5,002,080,663.95
5. Step 5: Solve for x
   x = 5,002,080,663.95/80,809.31
6. Step 6: Final answer
   x = 61,899.81