Finding the Fourth Proportional to 23,498.90, 32,428.98 and 12,888.50

Step by Step Solution

1. Step 1: Write the proportion equation
   23,498.90 : 32,428.98 = 12,888.50 : x
2. Step 2: Convert to fraction form
   23,498.90/32,428.98 = 12,888.50/x
3. Step 3: Cross multiply
   23,498.90x = 32,428.98 × 12,888.50
4. Step 4: Simplify right side
   23,498.90x = 417,960,989.80
5. Step 5: Solve for x
   x = 417,960,989.80/23,498.90
6. Step 6: Final answer
   x = 17,786.41