Finding the Fourth Proportional to 23,498.55, 32,430.09 and 12,890.25

Step by Step Solution

1. Step 1: Write the proportion equation
   23,498.55 : 32,430.09 = 12,890.25 : x
2. Step 2: Convert to fraction form
   23,498.55/32,430.09 = 12,890.25/x
3. Step 3: Cross multiply
   23,498.55x = 32,430.09 × 12,890.25
4. Step 4: Simplify right side
   23,498.55x = 418,031,967.62
5. Step 5: Solve for x
   x = 418,031,967.62/23,498.55
6. Step 6: Final answer
   x = 17,789.69