Finding the Fourth Proportional to 10,728.72, 14,808.60 and 7,002

Step by Step Solution

1. Step 1: Write the proportion equation
   10,728.72 : 14,808.60 = 7,002 : x
2. Step 2: Convert to fraction form
   10,728.72/14,808.60 = 7,002/x
3. Step 3: Cross multiply
   10,728.72x = 14,808.60 × 7,002
4. Step 4: Simplify right side
   10,728.72x = 103,689,817.20
5. Step 5: Solve for x
   x = 103,689,817.20/10,728.72
6. Step 6: Final answer
   x = 9,664.70