Finding the Fourth Proportional to 22,538.14, 31,099.91 and 12,465.20

Step by Step Solution

1. Step 1: Write the proportion equation
   22,538.14 : 31,099.91 = 12,465.20 : x
2. Step 2: Convert to fraction form
   22,538.14/31,099.91 = 12,465.20/x
3. Step 3: Cross multiply
   22,538.14x = 31,099.91 × 12,465.20
4. Step 4: Simplify right side
   22,538.14x = 387,666,613.56
5. Step 5: Solve for x
   x = 387,666,613.56/22,538.14
6. Step 6: Final answer
   x = 17,200.47