Finding the Fourth Proportional to 1,086.92, 1,627.76 and 623.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.92 : 1,627.76 = 623.28 : x
2. Step 2: Convert to fraction form
   1,086.92/1,627.76 = 623.28/x
3. Step 3: Cross multiply
   1,086.92x = 1,627.76 × 623.28
4. Step 4: Simplify right side
   1,086.92x = 1,014,550.25
5. Step 5: Solve for x
   x = 1,014,550.25/1,086.92
6. Step 6: Final answer
   x = 933.42