Finding the Fourth Proportional to 8,423.10, 12,618.86 and 7,045.29

Step by Step Solution

1. Step 1: Write the proportion equation
   8,423.10 : 12,618.86 = 7,045.29 : x
2. Step 2: Convert to fraction form
   8,423.10/12,618.86 = 7,045.29/x
3. Step 3: Cross multiply
   8,423.10x = 12,618.86 × 7,045.29
4. Step 4: Simplify right side
   8,423.10x = 88,903,492.94
5. Step 5: Solve for x
   x = 88,903,492.94/8,423.10
6. Step 6: Final answer
   x = 10,554.72