Finding the Fourth Proportional to 31,073.60, 42,864.72 and 18,495.92

Step by Step Solution

1. Step 1: Write the proportion equation
   31,073.60 : 42,864.72 = 18,495.92 : x
2. Step 2: Convert to fraction form
   31,073.60/42,864.72 = 18,495.92/x
3. Step 3: Cross multiply
   31,073.60x = 42,864.72 × 18,495.92
4. Step 4: Simplify right side
   31,073.60x = 792,822,431.94
5. Step 5: Solve for x
   x = 792,822,431.94/31,073.60
6. Step 6: Final answer
   x = 25,514.34