Finding the Fourth Proportional to 23,499.21, 32,429.85 and 12,889.23

Step by Step Solution

1. Step 1: Write the proportion equation
   23,499.21 : 32,429.85 = 12,889.23 : x
2. Step 2: Convert to fraction form
   23,499.21/32,429.85 = 12,889.23/x
3. Step 3: Cross multiply
   23,499.21x = 32,429.85 × 12,889.23
4. Step 4: Simplify right side
   23,499.21x = 417,995,795.52
5. Step 5: Solve for x
   x = 417,995,795.52/23,499.21
6. Step 6: Final answer
   x = 17,787.65