Finding the Fourth Proportional to 31,108.56, 42,925 and 17,858

Step by Step Solution

1. Step 1: Write the proportion equation
   31,108.56 : 42,925 = 17,858 : x
2. Step 2: Convert to fraction form
   31,108.56/42,925 = 17,858/x
3. Step 3: Cross multiply
   31,108.56x = 42,925 × 17,858
4. Step 4: Simplify right side
   31,108.56x = 766,554,650
5. Step 5: Solve for x
   x = 766,554,650/31,108.56
6. Step 6: Final answer
   x = 24,641.28