Finding the Fourth Proportional to 10,888.68, 16,339.86 and 3,963

Step by Step Solution

1. Step 1: Write the proportion equation
   10,888.68 : 16,339.86 = 3,963 : x
2. Step 2: Convert to fraction form
   10,888.68/16,339.86 = 3,963/x
3. Step 3: Cross multiply
   10,888.68x = 16,339.86 × 3,963
4. Step 4: Simplify right side
   10,888.68x = 64,754,865.18
5. Step 5: Solve for x
   x = 64,754,865.18/10,888.68
6. Step 6: Final answer
   x = 5,946.99