Finding the Fourth Proportional to 8,640.18, 12,962.98 and 3,093.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,640.18 : 12,962.98 = 3,093.42 : x
2. Step 2: Convert to fraction form
   8,640.18/12,962.98 = 3,093.42/x
3. Step 3: Cross multiply
   8,640.18x = 12,962.98 × 3,093.42
4. Step 4: Simplify right side
   8,640.18x = 40,099,941.59
5. Step 5: Solve for x
   x = 40,099,941.59/8,640.18
6. Step 6: Final answer
   x = 4,641.10