Finding the Fourth Proportional to 2,300.76, 3,449.05 and 913.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,300.76 : 3,449.05 = 913.78 : x
2. Step 2: Convert to fraction form
   2,300.76/3,449.05 = 913.78/x
3. Step 3: Cross multiply
   2,300.76x = 3,449.05 × 913.78
4. Step 4: Simplify right side
   2,300.76x = 3,151,657.95
5. Step 5: Solve for x
   x = 3,151,657.95/2,300.76
6. Step 6: Final answer
   x = 1,369.84