Finding the Fourth Proportional to 23,509, 32,442.72 and 12,898.40

Step by Step Solution

1. Step 1: Write the proportion equation
   23,509 : 32,442.72 = 12,898.40 : x
2. Step 2: Convert to fraction form
   23,509/32,442.72 = 12,898.40/x
3. Step 3: Cross multiply
   23,509x = 32,442.72 × 12,898.40
4. Step 4: Simplify right side
   23,509x = 418,459,179.65
5. Step 5: Solve for x
   x = 418,459,179.65/23,509
6. Step 6: Final answer
   x = 17,799.96