Finding the Fourth Proportional to 2,613.17, 3,920.37 and 764.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,613.17 : 3,920.37 = 764.34 : x
2. Step 2: Convert to fraction form
   2,613.17/3,920.37 = 764.34/x
3. Step 3: Cross multiply
   2,613.17x = 3,920.37 × 764.34
4. Step 4: Simplify right side
   2,613.17x = 2,996,495.61
5. Step 5: Solve for x
   x = 2,996,495.61/2,613.17
6. Step 6: Final answer
   x = 1,146.69