Finding the Fourth Proportional to 3,861.53, 5,792.24 and 939.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,861.53 : 5,792.24 = 939.86 : x
2. Step 2: Convert to fraction form
   3,861.53/5,792.24 = 939.86/x
3. Step 3: Cross multiply
   3,861.53x = 5,792.24 × 939.86
4. Step 4: Simplify right side
   3,861.53x = 5,443,861.03
5. Step 5: Solve for x
   x = 5,443,861.03/3,861.53
6. Step 6: Final answer
   x = 1,409.77