Finding the Fourth Proportional to 9,050.79, 12,479.22 and 7,789.68

Step by Step Solution

1. Step 1: Write the proportion equation
   9,050.79 : 12,479.22 = 7,789.68 : x
2. Step 2: Convert to fraction form
   9,050.79/12,479.22 = 7,789.68/x
3. Step 3: Cross multiply
   9,050.79x = 12,479.22 × 7,789.68
4. Step 4: Simplify right side
   9,050.79x = 97,209,130.45
5. Step 5: Solve for x
   x = 97,209,130.45/9,050.79
6. Step 6: Final answer
   x = 10,740.40