Finding the Fourth Proportional to 6,923.52, 10,389.33 and 3,639.78

Step by Step Solution

1. Step 1: Write the proportion equation
   6,923.52 : 10,389.33 = 3,639.78 : x
2. Step 2: Convert to fraction form
   6,923.52/10,389.33 = 3,639.78/x
3. Step 3: Cross multiply
   6,923.52x = 10,389.33 × 3,639.78
4. Step 4: Simplify right side
   6,923.52x = 37,814,875.55
5. Step 5: Solve for x
   x = 37,814,875.55/6,923.52
6. Step 6: Final answer
   x = 5,461.80