Finding the Fourth Proportional to 2,607.86, 3,912.17 and 758.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,607.86 : 3,912.17 = 758.99 : x
2. Step 2: Convert to fraction form
   2,607.86/3,912.17 = 758.99/x
3. Step 3: Cross multiply
   2,607.86x = 3,912.17 × 758.99
4. Step 4: Simplify right side
   2,607.86x = 2,969,274.55
5. Step 5: Solve for x
   x = 2,969,274.55/2,607.86
6. Step 6: Final answer
   x = 1,138.59