Finding the Fourth Proportional to 31,140.44, 42,974.72 and 16,994.20

Step by Step Solution

1. Step 1: Write the proportion equation
   31,140.44 : 42,974.72 = 16,994.20 : x
2. Step 2: Convert to fraction form
   31,140.44/42,974.72 = 16,994.20/x
3. Step 3: Cross multiply
   31,140.44x = 42,974.72 × 16,994.20
4. Step 4: Simplify right side
   31,140.44x = 730,320,686.78
5. Step 5: Solve for x
   x = 730,320,686.78/31,140.44
6. Step 6: Final answer
   x = 23,452.48