Finding the Fourth Proportional to 9,128.34, 13,690.74 and 3,861.62

Step by Step Solution

1. Step 1: Write the proportion equation
   9,128.34 : 13,690.74 = 3,861.62 : x
2. Step 2: Convert to fraction form
   9,128.34/13,690.74 = 3,861.62/x
3. Step 3: Cross multiply
   9,128.34x = 13,690.74 × 3,861.62
4. Step 4: Simplify right side
   9,128.34x = 52,868,435.40
5. Step 5: Solve for x
   x = 52,868,435.40/9,128.34
6. Step 6: Final answer
   x = 5,791.68