Finding the Fourth Proportional to 23,140.58, 31,934.15 and 12,530.21

Step by Step Solution

1. Step 1: Write the proportion equation
   23,140.58 : 31,934.15 = 12,530.21 : x
2. Step 2: Convert to fraction form
   23,140.58/31,934.15 = 12,530.21/x
3. Step 3: Cross multiply
   23,140.58x = 31,934.15 × 12,530.21
4. Step 4: Simplify right side
   23,140.58x = 400,141,716.83
5. Step 5: Solve for x
   x = 400,141,716.83/23,140.58
6. Step 6: Final answer
   x = 17,291.78