Finding the Fourth Proportional to 23,127.50, 31,915.95 and 13,191.50

Step by Step Solution

1. Step 1: Write the proportion equation
   23,127.50 : 31,915.95 = 13,191.50 : x
2. Step 2: Convert to fraction form
   23,127.50/31,915.95 = 13,191.50/x
3. Step 3: Cross multiply
   23,127.50x = 31,915.95 × 13,191.50
4. Step 4: Simplify right side
   23,127.50x = 421,019,254.43
5. Step 5: Solve for x
   x = 421,019,254.43/23,127.50
6. Step 6: Final answer
   x = 18,204.27