Finding the Fourth Proportional to 23,530.56, 32,470.57 and 12,920.88

Step by Step Solution

1. Step 1: Write the proportion equation
   23,530.56 : 32,470.57 = 12,920.88 : x
2. Step 2: Convert to fraction form
   23,530.56/32,470.57 = 12,920.88/x
3. Step 3: Cross multiply
   23,530.56x = 32,470.57 × 12,920.88
4. Step 4: Simplify right side
   23,530.56x = 419,548,338.50
5. Step 5: Solve for x
   x = 419,548,338.50/23,530.56
6. Step 6: Final answer
   x = 17,829.93