Finding the Fourth Proportional to 13,380.26, 18,464.76 and 7,412.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,380.26 : 18,464.76 = 7,412.31 : x
2. Step 2: Convert to fraction form
   13,380.26/18,464.76 = 7,412.31/x
3. Step 3: Cross multiply
   13,380.26x = 18,464.76 × 7,412.31
4. Step 4: Simplify right side
   13,380.26x = 136,866,566.64
5. Step 5: Solve for x
   x = 136,866,566.64/13,380.26
6. Step 6: Final answer
   x = 10,228.99