Finding the Fourth Proportional to 7,779.58, 10,681.58 and 7,576.61

Step by Step Solution

1. Step 1: Write the proportion equation
   7,779.58 : 10,681.58 = 7,576.61 : x
2. Step 2: Convert to fraction form
   7,779.58/10,681.58 = 7,576.61/x
3. Step 3: Cross multiply
   7,779.58x = 10,681.58 × 7,576.61
4. Step 4: Simplify right side
   7,779.58x = 80,930,131.38
5. Step 5: Solve for x
   x = 80,930,131.38/7,779.58
6. Step 6: Final answer
   x = 10,402.90