Finding the Fourth Proportional to 1,067.84, 1,602.72 and 720.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,067.84 : 1,602.72 = 720.32 : x
2. Step 2: Convert to fraction form
   1,067.84/1,602.72 = 720.32/x
3. Step 3: Cross multiply
   1,067.84x = 1,602.72 × 720.32
4. Step 4: Simplify right side
   1,067.84x = 1,154,471.27
5. Step 5: Solve for x
   x = 1,154,471.27/1,067.84
6. Step 6: Final answer
   x = 1,081.13