Finding the Fourth Proportional to 23,500.17, 32,431.14 and 13,428.72

Step by Step Solution

1. Step 1: Write the proportion equation
   23,500.17 : 32,431.14 = 13,428.72 : x
2. Step 2: Convert to fraction form
   23,500.17/32,431.14 = 13,428.72/x
3. Step 3: Cross multiply
   23,500.17x = 32,431.14 × 13,428.72
4. Step 4: Simplify right side
   23,500.17x = 435,508,698.34
5. Step 5: Solve for x
   x = 435,508,698.34/23,500.17
6. Step 6: Final answer
   x = 18,532.15