Finding the Fourth Proportional to 7,776.06, 10,730.61 and 4,239.15

Step by Step Solution

1. Step 1: Write the proportion equation
   7,776.06 : 10,730.61 = 4,239.15 : x
2. Step 2: Convert to fraction form
   7,776.06/10,730.61 = 4,239.15/x
3. Step 3: Cross multiply
   7,776.06x = 10,730.61 × 4,239.15
4. Step 4: Simplify right side
   7,776.06x = 45,488,665.38
5. Step 5: Solve for x
   x = 45,488,665.38/7,776.06
6. Step 6: Final answer
   x = 5,849.83