Finding the Fourth Proportional to 13,077.20, 18,046.15 and 7,412.47

Step by Step Solution

1. Step 1: Write the proportion equation
   13,077.20 : 18,046.15 = 7,412.47 : x
2. Step 2: Convert to fraction form
   13,077.20/18,046.15 = 7,412.47/x
3. Step 3: Cross multiply
   13,077.20x = 18,046.15 × 7,412.47
4. Step 4: Simplify right side
   13,077.20x = 133,766,455.26
5. Step 5: Solve for x
   x = 133,766,455.26/13,077.20
6. Step 6: Final answer
   x = 10,228.99