Finding the Fourth Proportional to 1,175.72, 1,622.37 and 678.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,175.72 : 1,622.37 = 678.32 : x
2. Step 2: Convert to fraction form
   1,175.72/1,622.37 = 678.32/x
3. Step 3: Cross multiply
   1,175.72x = 1,622.37 × 678.32
4. Step 4: Simplify right side
   1,175.72x = 1,100,486.02
5. Step 5: Solve for x
   x = 1,100,486.02/1,175.72
6. Step 6: Final answer
   x = 936.01