Finding the Fourth Proportional to 2,611.69, 3,917.90 and 762.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,611.69 : 3,917.90 = 762.94 : x
2. Step 2: Convert to fraction form
   2,611.69/3,917.90 = 762.94/x
3. Step 3: Cross multiply
   2,611.69x = 3,917.90 × 762.94
4. Step 4: Simplify right side
   2,611.69x = 2,989,109.02
5. Step 5: Solve for x
   x = 2,989,109.02/2,611.69
6. Step 6: Final answer
   x = 1,144.51