Finding the Fourth Proportional to 23,509.98, 32,444.55 and 12,900.20

Step by Step Solution

1. Step 1: Write the proportion equation
   23,509.98 : 32,444.55 = 12,900.20 : x
2. Step 2: Convert to fraction form
   23,509.98/32,444.55 = 12,900.20/x
3. Step 3: Cross multiply
   23,509.98x = 32,444.55 × 12,900.20
4. Step 4: Simplify right side
   23,509.98x = 418,541,021.69
5. Step 5: Solve for x
   x = 418,541,021.69/23,509.98
6. Step 6: Final answer
   x = 17,802.70