Finding the Fourth Proportional to 23,180.42, 31,988.99 and 12,570.05

Step by Step Solution

1. Step 1: Write the proportion equation
   23,180.42 : 31,988.99 = 12,570.05 : x
2. Step 2: Convert to fraction form
   23,180.42/31,988.99 = 12,570.05/x
3. Step 3: Cross multiply
   23,180.42x = 31,988.99 × 12,570.05
4. Step 4: Simplify right side
   23,180.42x = 402,103,315.15
5. Step 5: Solve for x
   x = 402,103,315.15/23,180.42
6. Step 6: Final answer
   x = 17,346.68