Finding the Fourth Proportional to 31,141.12, 42,975 and 16,994.20

Step by Step Solution

1. Step 1: Write the proportion equation
   31,141.12 : 42,975 = 16,994.20 : x
2. Step 2: Convert to fraction form
   31,141.12/42,975 = 16,994.20/x
3. Step 3: Cross multiply
   31,141.12x = 42,975 × 16,994.20
4. Step 4: Simplify right side
   31,141.12x = 730,325,745
5. Step 5: Solve for x
   x = 730,325,745/31,141.12
6. Step 6: Final answer
   x = 23,452.13