Finding the Fourth Proportional to 23,830.15, 32,889.55 and 13,223.20

Step by Step Solution

1. Step 1: Write the proportion equation
   23,830.15 : 32,889.55 = 13,223.20 : x
2. Step 2: Convert to fraction form
   23,830.15/32,889.55 = 13,223.20/x
3. Step 3: Cross multiply
   23,830.15x = 32,889.55 × 13,223.20
4. Step 4: Simplify right side
   23,830.15x = 434,905,097.56
5. Step 5: Solve for x
   x = 434,905,097.56/23,830.15
6. Step 6: Final answer
   x = 18,250.20