Finding the Fourth Proportional to 1,243.02, 1,715.46 and 719.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,243.02 : 1,715.46 = 719.10 : x
2. Step 2: Convert to fraction form
   1,243.02/1,715.46 = 719.10/x
3. Step 3: Cross multiply
   1,243.02x = 1,715.46 × 719.10
4. Step 4: Simplify right side
   1,243.02x = 1,233,587.29
5. Step 5: Solve for x
   x = 1,233,587.29/1,243.02
6. Step 6: Final answer
   x = 992.41