Finding the Fourth Proportional to 1,071.42, 1,479.15 and 722.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,071.42 : 1,479.15 = 722.58 : x
2. Step 2: Convert to fraction form
   1,071.42/1,479.15 = 722.58/x
3. Step 3: Cross multiply
   1,071.42x = 1,479.15 × 722.58
4. Step 4: Simplify right side
   1,071.42x = 1,068,804.21
5. Step 5: Solve for x
   x = 1,068,804.21/1,071.42
6. Step 6: Final answer
   x = 997.56