Finding the Fourth Proportional to 31,155.10, 42,994.12 and 17,008.18

Step by Step Solution

1. Step 1: Write the proportion equation
   31,155.10 : 42,994.12 = 17,008.18 : x
2. Step 2: Convert to fraction form
   31,155.10/42,994.12 = 17,008.18/x
3. Step 3: Cross multiply
   31,155.10x = 42,994.12 × 17,008.18
4. Step 4: Simplify right side
   31,155.10x = 731,251,731.90
5. Step 5: Solve for x
   x = 731,251,731.90/31,155.10
6. Step 6: Final answer
   x = 23,471.33