Finding the Fourth Proportional to 1,499.78, 2,248.69 and 719.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.78 : 2,248.69 = 719.76 : x
2. Step 2: Convert to fraction form
   1,499.78/2,248.69 = 719.76/x
3. Step 3: Cross multiply
   1,499.78x = 2,248.69 × 719.76
4. Step 4: Simplify right side
   1,499.78x = 1,618,502.27
5. Step 5: Solve for x
   x = 1,618,502.27/1,499.78
6. Step 6: Final answer
   x = 1,079.16