Finding the Fourth Proportional to 10,865.61, 16,288.56 and 3,938.49

Step by Step Solution

1. Step 1: Write the proportion equation
   10,865.61 : 16,288.56 = 3,938.49 : x
2. Step 2: Convert to fraction form
   10,865.61/16,288.56 = 3,938.49/x
3. Step 3: Cross multiply
   10,865.61x = 16,288.56 × 3,938.49
4. Step 4: Simplify right side
   10,865.61x = 64,152,330.67
5. Step 5: Solve for x
   x = 64,152,330.67/10,865.61
6. Step 6: Final answer
   x = 5,904.16