Finding the Fourth Proportional to 31,107.56, 42,923.62 and 17,857

Step by Step Solution

1. Step 1: Write the proportion equation
   31,107.56 : 42,923.62 = 17,857 : x
2. Step 2: Convert to fraction form
   31,107.56/42,923.62 = 17,857/x
3. Step 3: Cross multiply
   31,107.56x = 42,923.62 × 17,857
4. Step 4: Simplify right side
   31,107.56x = 766,487,082.34
5. Step 5: Solve for x
   x = 766,487,082.34/31,107.56
6. Step 6: Final answer
   x = 24,639.90