Finding the Fourth Proportional to 23,501.40, 32,431.98 and 12,891.07

Step by Step Solution

1. Step 1: Write the proportion equation
   23,501.40 : 32,431.98 = 12,891.07 : x
2. Step 2: Convert to fraction form
   23,501.40/32,431.98 = 12,891.07/x
3. Step 3: Cross multiply
   23,501.40x = 32,431.98 × 12,891.07
4. Step 4: Simplify right side
   23,501.40x = 418,082,924.42
5. Step 5: Solve for x
   x = 418,082,924.42/23,501.40
6. Step 6: Final answer
   x = 17,789.70