Finding the Fourth Proportional to 12,111.42, 18,167.94 and 4,715.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,111.42 : 18,167.94 = 4,715.40 : x
2. Step 2: Convert to fraction form
   12,111.42/18,167.94 = 4,715.40/x
3. Step 3: Cross multiply
   12,111.42x = 18,167.94 × 4,715.40
4. Step 4: Simplify right side
   12,111.42x = 85,669,104.28
5. Step 5: Solve for x
   x = 85,669,104.28/12,111.42
6. Step 6: Final answer
   x = 7,073.42