Finding the Fourth Proportional to 25,685, 35,448.18 and 14,507.72

Step by Step Solution

1. Step 1: Write the proportion equation
   25,685 : 35,448.18 = 14,507.72 : x
2. Step 2: Convert to fraction form
   25,685/35,448.18 = 14,507.72/x
3. Step 3: Cross multiply
   25,685x = 35,448.18 × 14,507.72
4. Step 4: Simplify right side
   25,685x = 514,272,269.95
5. Step 5: Solve for x
   x = 514,272,269.95/25,685
6. Step 6: Final answer
   x = 20,022.28