Finding the Fourth Proportional to 10,779.62, 14,870.96 and 7,790.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,779.62 : 14,870.96 = 7,790.72 : x
2. Step 2: Convert to fraction form
   10,779.62/14,870.96 = 7,790.72/x
3. Step 3: Cross multiply
   10,779.62x = 14,870.96 × 7,790.72
4. Step 4: Simplify right side
   10,779.62x = 115,855,485.49
5. Step 5: Solve for x
   x = 115,855,485.49/10,779.62
6. Step 6: Final answer
   x = 10,747.64