Finding the Fourth Proportional to 23,160.90, 31,962.15 and 12,550.55

Step by Step Solution

1. Step 1: Write the proportion equation
   23,160.90 : 31,962.15 = 12,550.55 : x
2. Step 2: Convert to fraction form
   23,160.90/31,962.15 = 12,550.55/x
3. Step 3: Cross multiply
   23,160.90x = 31,962.15 × 12,550.55
4. Step 4: Simplify right side
   23,160.90x = 401,142,561.68
5. Step 5: Solve for x
   x = 401,142,561.68/23,160.90
6. Step 6: Final answer
   x = 17,319.82