Finding the Fourth Proportional to 23,490.99, 32,417.55 and 12,880.80

Step by Step Solution

1. Step 1: Write the proportion equation
   23,490.99 : 32,417.55 = 12,880.80 : x
2. Step 2: Convert to fraction form
   23,490.99/32,417.55 = 12,880.80/x
3. Step 3: Cross multiply
   23,490.99x = 32,417.55 × 12,880.80
4. Step 4: Simplify right side
   23,490.99x = 417,563,978.04
5. Step 5: Solve for x
   x = 417,563,978.04/23,490.99
6. Step 6: Final answer
   x = 17,775.50