Finding the Fourth Proportional to 23,499.60, 32,429.28 and 12,889.08

Step by Step Solution

1. Step 1: Write the proportion equation
   23,499.60 : 32,429.28 = 12,889.08 : x
2. Step 2: Convert to fraction form
   23,499.60/32,429.28 = 12,889.08/x
3. Step 3: Cross multiply
   23,499.60x = 32,429.28 × 12,889.08
4. Step 4: Simplify right side
   23,499.60x = 417,983,584.26
5. Step 5: Solve for x
   x = 417,983,584.26/23,499.60
6. Step 6: Final answer
   x = 17,786.84