Finding the Fourth Proportional to 12,443.61, 18,668.04 and 4,123.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,443.61 : 18,668.04 = 4,123.15 : x
2. Step 2: Convert to fraction form
   12,443.61/18,668.04 = 4,123.15/x
3. Step 3: Cross multiply
   12,443.61x = 18,668.04 × 4,123.15
4. Step 4: Simplify right side
   12,443.61x = 76,971,129.13
5. Step 5: Solve for x
   x = 76,971,129.13/12,443.61
6. Step 6: Final answer
   x = 6,185.59