Finding the Fourth Proportional to 31,120.81, 42,946.51 and 17,692.06

Step by Step Solution

1. Step 1: Write the proportion equation
   31,120.81 : 42,946.51 = 17,692.06 : x
2. Step 2: Convert to fraction form
   31,120.81/42,946.51 = 17,692.06/x
3. Step 3: Cross multiply
   31,120.81x = 42,946.51 × 17,692.06
4. Step 4: Simplify right side
   31,120.81x = 759,812,354.86
5. Step 5: Solve for x
   x = 759,812,354.86/31,120.81
6. Step 6: Final answer
   x = 24,414.93