Finding the Fourth Proportional to 12,779.27, 17,633.30 and 7,399.79

Step by Step Solution

1. Step 1: Write the proportion equation
   12,779.27 : 17,633.30 = 7,399.79 : x
2. Step 2: Convert to fraction form
   12,779.27/17,633.30 = 7,399.79/x
3. Step 3: Cross multiply
   12,779.27x = 17,633.30 × 7,399.79
4. Step 4: Simplify right side
   12,779.27x = 130,482,591.84
5. Step 5: Solve for x
   x = 130,482,591.84/12,779.27
6. Step 6: Final answer
   x = 10,210.49