Finding the Fourth Proportional to 12,113.55, 18,167.29 and 4,320.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,113.55 : 18,167.29 = 4,320.54 : x
2. Step 2: Convert to fraction form
   12,113.55/18,167.29 = 4,320.54/x
3. Step 3: Cross multiply
   12,113.55x = 18,167.29 × 4,320.54
4. Step 4: Simplify right side
   12,113.55x = 78,492,492.34
5. Step 5: Solve for x
   x = 78,492,492.34/12,113.55
6. Step 6: Final answer
   x = 6,479.73