Finding the Fourth Proportional to 2,499.92, 3,749.79 and 768.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,499.92 : 3,749.79 = 768.50 : x
2. Step 2: Convert to fraction form
   2,499.92/3,749.79 = 768.50/x
3. Step 3: Cross multiply
   2,499.92x = 3,749.79 × 768.50
4. Step 4: Simplify right side
   2,499.92x = 2,881,713.62
5. Step 5: Solve for x
   x = 2,881,713.62/2,499.92
6. Step 6: Final answer
   x = 1,152.72