Finding the Fourth Proportional to 31,063.49, 42,861.92 and 18,320.69

Step by Step Solution

1. Step 1: Write the proportion equation
   31,063.49 : 42,861.92 = 18,320.69 : x
2. Step 2: Convert to fraction form
   31,063.49/42,861.92 = 18,320.69/x
3. Step 3: Cross multiply
   31,063.49x = 42,861.92 × 18,320.69
4. Step 4: Simplify right side
   31,063.49x = 785,259,643.21
5. Step 5: Solve for x
   x = 785,259,643.21/31,063.49
6. Step 6: Final answer
   x = 25,279.19