Finding the Fourth Proportional to 23,289.76, 32,139.20 and 13,219.12

Step by Step Solution

1. Step 1: Write the proportion equation
   23,289.76 : 32,139.20 = 13,219.12 : x
2. Step 2: Convert to fraction form
   23,289.76/32,139.20 = 13,219.12/x
3. Step 3: Cross multiply
   23,289.76x = 32,139.20 × 13,219.12
4. Step 4: Simplify right side
   23,289.76x = 424,851,941.50
5. Step 5: Solve for x
   x = 424,851,941.50/23,289.76
6. Step 6: Final answer
   x = 18,242.01