Finding the Fourth Proportional to 23,003.55, 34,487.10 and 12,615.30

Step by Step Solution

1. Step 1: Write the proportion equation
   23,003.55 : 34,487.10 = 12,615.30 : x
2. Step 2: Convert to fraction form
   23,003.55/34,487.10 = 12,615.30/x
3. Step 3: Cross multiply
   23,003.55x = 34,487.10 × 12,615.30
4. Step 4: Simplify right side
   23,003.55x = 435,065,112.63
5. Step 5: Solve for x
   x = 435,065,112.63/23,003.55
6. Step 6: Final answer
   x = 18,912.96