Finding the Fourth Proportional to 12,302.10, 18,459.63 and 7,111.62

Step by Step Solution

1. Step 1: Write the proportion equation
   12,302.10 : 18,459.63 = 7,111.62 : x
2. Step 2: Convert to fraction form
   12,302.10/18,459.63 = 7,111.62/x
3. Step 3: Cross multiply
   12,302.10x = 18,459.63 × 7,111.62
4. Step 4: Simplify right side
   12,302.10x = 131,277,873.90
5. Step 5: Solve for x
   x = 131,277,873.90/12,302.10
6. Step 6: Final answer
   x = 10,671.18