Finding the Fourth Proportional to 31,112.25, 42,937.98 and 18,369.64

Step by Step Solution

1. Step 1: Write the proportion equation
   31,112.25 : 42,937.98 = 18,369.64 : x
2. Step 2: Convert to fraction form
   31,112.25/42,937.98 = 18,369.64/x
3. Step 3: Cross multiply
   31,112.25x = 42,937.98 × 18,369.64
4. Step 4: Simplify right side
   31,112.25x = 788,755,234.93
5. Step 5: Solve for x
   x = 788,755,234.93/31,112.25
6. Step 6: Final answer
   x = 25,351.92