Finding the Fourth Proportional to 2,309.61, 3,465.78 and 849.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,309.61 : 3,465.78 = 849.79 : x
2. Step 2: Convert to fraction form
   2,309.61/3,465.78 = 849.79/x
3. Step 3: Cross multiply
   2,309.61x = 3,465.78 × 849.79
4. Step 4: Simplify right side
   2,309.61x = 2,945,167.86
5. Step 5: Solve for x
   x = 2,945,167.86/2,309.61
6. Step 6: Final answer
   x = 1,275.18