Finding the Fourth Proportional to 2,499.60, 3,749.81 and 768.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,499.60 : 3,749.81 = 768.23 : x
2. Step 2: Convert to fraction form
   2,499.60/3,749.81 = 768.23/x
3. Step 3: Cross multiply
   2,499.60x = 3,749.81 × 768.23
4. Step 4: Simplify right side
   2,499.60x = 2,880,693.95
5. Step 5: Solve for x
   x = 2,880,693.95/2,499.60
6. Step 6: Final answer
   x = 1,152.46