Finding the Fourth Proportional to 31,065.20, 42,875.88 and 18,496.88

Step by Step Solution

1. Step 1: Write the proportion equation
   31,065.20 : 42,875.88 = 18,496.88 : x
2. Step 2: Convert to fraction form
   31,065.20/42,875.88 = 18,496.88/x
3. Step 3: Cross multiply
   31,065.20x = 42,875.88 × 18,496.88
4. Step 4: Simplify right side
   31,065.20x = 793,070,007.25
5. Step 5: Solve for x
   x = 793,070,007.25/31,065.20
6. Step 6: Final answer
   x = 25,529.21