Finding the Fourth Proportional to 2,713.94, 4,070.55 and 766.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,713.94 : 4,070.55 = 766.31 : x
2. Step 2: Convert to fraction form
   2,713.94/4,070.55 = 766.31/x
3. Step 3: Cross multiply
   2,713.94x = 4,070.55 × 766.31
4. Step 4: Simplify right side
   2,713.94x = 3,119,303.17
5. Step 5: Solve for x
   x = 3,119,303.17/2,713.94
6. Step 6: Final answer
   x = 1,149.36