Finding the Fourth Proportional to 12,090.16, 18,124.31 and 4,297.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,090.16 : 18,124.31 = 4,297.15 : x
2. Step 2: Convert to fraction form
   12,090.16/18,124.31 = 4,297.15/x
3. Step 3: Cross multiply
   12,090.16x = 18,124.31 × 4,297.15
4. Step 4: Simplify right side
   12,090.16x = 77,882,878.72
5. Step 5: Solve for x
   x = 77,882,878.72/12,090.16
6. Step 6: Final answer
   x = 6,441.84