Finding the Fourth Proportional to 31,643.10, 43,696.47 and 25,401.18

Step by Step Solution

1. Step 1: Write the proportion equation
   31,643.10 : 43,696.47 = 25,401.18 : x
2. Step 2: Convert to fraction form
   31,643.10/43,696.47 = 25,401.18/x
3. Step 3: Cross multiply
   31,643.10x = 43,696.47 × 25,401.18
4. Step 4: Simplify right side
   31,643.10x = 1,109,941,899.83
5. Step 5: Solve for x
   x = 1,109,941,899.83/31,643.10
6. Step 6: Final answer
   x = 35,076.90