Finding the Fourth Proportional to 2,713.59, 4,070.38 and 765.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,713.59 : 4,070.38 = 765.79 : x
2. Step 2: Convert to fraction form
   2,713.59/4,070.38 = 765.79/x
3. Step 3: Cross multiply
   2,713.59x = 4,070.38 × 765.79
4. Step 4: Simplify right side
   2,713.59x = 3,117,056.30
5. Step 5: Solve for x
   x = 3,117,056.30/2,713.59
6. Step 6: Final answer
   x = 1,148.68