Finding the Fourth Proportional to 23,498.40, 32,428.98 and 12,889.02

Step by Step Solution

1. Step 1: Write the proportion equation
   23,498.40 : 32,428.98 = 12,889.02 : x
2. Step 2: Convert to fraction form
   23,498.40/32,428.98 = 12,889.02/x
3. Step 3: Cross multiply
   23,498.40x = 32,428.98 × 12,889.02
4. Step 4: Simplify right side
   23,498.40x = 417,977,771.80
5. Step 5: Solve for x
   x = 417,977,771.80/23,498.40
6. Step 6: Final answer
   x = 17,787.50