Finding the Fourth Proportional to 2,713.47, 4,070.25 and 765.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,713.47 : 4,070.25 = 765.72 : x
2. Step 2: Convert to fraction form
   2,713.47/4,070.25 = 765.72/x
3. Step 3: Cross multiply
   2,713.47x = 4,070.25 × 765.72
4. Step 4: Simplify right side
   2,713.47x = 3,116,671.83
5. Step 5: Solve for x
   x = 3,116,671.83/2,713.47
6. Step 6: Final answer
   x = 1,148.59