Finding the Fourth Proportional to 31,032.24, 42,813 and 18,937.32

Step by Step Solution

1. Step 1: Write the proportion equation
   31,032.24 : 42,813 = 18,937.32 : x
2. Step 2: Convert to fraction form
   31,032.24/42,813 = 18,937.32/x
3. Step 3: Cross multiply
   31,032.24x = 42,813 × 18,937.32
4. Step 4: Simplify right side
   31,032.24x = 810,763,481.16
5. Step 5: Solve for x
   x = 810,763,481.16/31,032.24
6. Step 6: Final answer
   x = 26,126.49