Finding the Fourth Proportional to 31,118.34, 42,942.24 and 17,690.16

Step by Step Solution

1. Step 1: Write the proportion equation
   31,118.34 : 42,942.24 = 17,690.16 : x
2. Step 2: Convert to fraction form
   31,118.34/42,942.24 = 17,690.16/x
3. Step 3: Cross multiply
   31,118.34x = 42,942.24 × 17,690.16
4. Step 4: Simplify right side
   31,118.34x = 759,655,096.36
5. Step 5: Solve for x
   x = 759,655,096.36/31,118.34
6. Step 6: Final answer
   x = 24,411.81