Finding the Fourth Proportional to 12,762.96, 17,611.98 and 7,985.04

Step by Step Solution

1. Step 1: Write the proportion equation
   12,762.96 : 17,611.98 = 7,985.04 : x
2. Step 2: Convert to fraction form
   12,762.96/17,611.98 = 7,985.04/x
3. Step 3: Cross multiply
   12,762.96x = 17,611.98 × 7,985.04
4. Step 4: Simplify right side
   12,762.96x = 140,632,364.78
5. Step 5: Solve for x
   x = 140,632,364.78/12,762.96
6. Step 6: Final answer
   x = 11,018.79