Finding the Fourth Proportional to 31,085.10, 42,896.88 and 17,656.20

Step by Step Solution

1. Step 1: Write the proportion equation
   31,085.10 : 42,896.88 = 17,656.20 : x
2. Step 2: Convert to fraction form
   31,085.10/42,896.88 = 17,656.20/x
3. Step 3: Cross multiply
   31,085.10x = 42,896.88 × 17,656.20
4. Step 4: Simplify right side
   31,085.10x = 757,395,892.66
5. Step 5: Solve for x
   x = 757,395,892.66/31,085.10
6. Step 6: Final answer
   x = 24,365.24