Finding the Fourth Proportional to 31,111.58, 42,936.53 and 17,687.04

Step by Step Solution

1. Step 1: Write the proportion equation
   31,111.58 : 42,936.53 = 17,687.04 : x
2. Step 2: Convert to fraction form
   31,111.58/42,936.53 = 17,687.04/x
3. Step 3: Cross multiply
   31,111.58x = 42,936.53 × 17,687.04
4. Step 4: Simplify right side
   31,111.58x = 759,420,035.14
5. Step 5: Solve for x
   x = 759,420,035.14/31,111.58
6. Step 6: Final answer
   x = 24,409.57