Finding the Fourth Proportional to 23,490.61, 32,416.81 and 12,880.32

Step by Step Solution

1. Step 1: Write the proportion equation
   23,490.61 : 32,416.81 = 12,880.32 : x
2. Step 2: Convert to fraction form
   23,490.61/32,416.81 = 12,880.32/x
3. Step 3: Cross multiply
   23,490.61x = 32,416.81 × 12,880.32
4. Step 4: Simplify right side
   23,490.61x = 417,538,732.42
5. Step 5: Solve for x
   x = 417,538,732.42/23,490.61
6. Step 6: Final answer
   x = 17,774.71