Finding the Fourth Proportional to 1,067.42, 1,602.52 and 722.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,067.42 : 1,602.52 = 722.30 : x
2. Step 2: Convert to fraction form
   1,067.42/1,602.52 = 722.30/x
3. Step 3: Cross multiply
   1,067.42x = 1,602.52 × 722.30
4. Step 4: Simplify right side
   1,067.42x = 1,157,490.38
5. Step 5: Solve for x
   x = 1,157,490.38/1,067.42
6. Step 6: Final answer
   x = 1,084.38