Finding the Fourth Proportional to 31,081.48, 42,895.52 and 18,981.28

Step by Step Solution

1. Step 1: Write the proportion equation
   31,081.48 : 42,895.52 = 18,981.28 : x
2. Step 2: Convert to fraction form
   31,081.48/42,895.52 = 18,981.28/x
3. Step 3: Cross multiply
   31,081.48x = 42,895.52 × 18,981.28
4. Step 4: Simplify right side
   31,081.48x = 814,211,875.87
5. Step 5: Solve for x
   x = 814,211,875.87/31,081.48
6. Step 6: Final answer
   x = 26,196.05