Finding the Fourth Proportional to 1,071.74, 1,479.69 and 736.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,071.74 : 1,479.69 = 736.20 : x
2. Step 2: Convert to fraction form
   1,071.74/1,479.69 = 736.20/x
3. Step 3: Cross multiply
   1,071.74x = 1,479.69 × 736.20
4. Step 4: Simplify right side
   1,071.74x = 1,089,347.78
5. Step 5: Solve for x
   x = 1,089,347.78/1,071.74
6. Step 6: Final answer
   x = 1,016.43