Finding the Fourth Proportional to 23,521.78, 32,460.24 and 12,912.40

Step by Step Solution

1. Step 1: Write the proportion equation
   23,521.78 : 32,460.24 = 12,912.40 : x
2. Step 2: Convert to fraction form
   23,521.78/32,460.24 = 12,912.40/x
3. Step 3: Cross multiply
   23,521.78x = 32,460.24 × 12,912.40
4. Step 4: Simplify right side
   23,521.78x = 419,139,602.98
5. Step 5: Solve for x
   x = 419,139,602.98/23,521.78
6. Step 6: Final answer
   x = 17,819.21