Finding the Fourth Proportional to 9,315.86, 12,850.98 and 7,074.02

Step by Step Solution

1. Step 1: Write the proportion equation
   9,315.86 : 12,850.98 = 7,074.02 : x
2. Step 2: Convert to fraction form
   9,315.86/12,850.98 = 7,074.02/x
3. Step 3: Cross multiply
   9,315.86x = 12,850.98 × 7,074.02
4. Step 4: Simplify right side
   9,315.86x = 90,908,089.54
5. Step 5: Solve for x
   x = 90,908,089.54/9,315.86
6. Step 6: Final answer
   x = 9,758.42