Finding the Fourth Proportional to 23,168.61, 31,972.65 and 12,558.42

Step by Step Solution

1. Step 1: Write the proportion equation
   23,168.61 : 31,972.65 = 12,558.42 : x
2. Step 2: Convert to fraction form
   23,168.61/31,972.65 = 12,558.42/x
3. Step 3: Cross multiply
   23,168.61x = 31,972.65 × 12,558.42
4. Step 4: Simplify right side
   23,168.61x = 401,525,967.21
5. Step 5: Solve for x
   x = 401,525,967.21/23,168.61
6. Step 6: Final answer
   x = 17,330.60