Finding the Fourth Proportional to 31,155.88, 42,994.86 and 17,008.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,155.88 : 42,994.86 = 17,008.72 : x
2. Step 2: Convert to fraction form
   31,155.88/42,994.86 = 17,008.72/x
3. Step 3: Cross multiply
   31,155.88x = 42,994.86 × 17,008.72
4. Step 4: Simplify right side
   31,155.88x = 731,287,535.18
5. Step 5: Solve for x
   x = 731,287,535.18/31,155.88
6. Step 6: Final answer
   x = 23,471.89