Finding the Fourth Proportional to 1,055.89, 1,456.68 and 719.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055.89 : 1,456.68 = 719.74 : x
2. Step 2: Convert to fraction form
   1,055.89/1,456.68 = 719.74/x
3. Step 3: Cross multiply
   1,055.89x = 1,456.68 × 719.74
4. Step 4: Simplify right side
   1,055.89x = 1,048,430.86
5. Step 5: Solve for x
   x = 1,048,430.86/1,055.89
6. Step 6: Final answer
   x = 992.94