Finding the Fourth Proportional to 1,086.79, 1,627.56 and 623.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.79 : 1,627.56 = 623.16 : x
2. Step 2: Convert to fraction form
   1,086.79/1,627.56 = 623.16/x
3. Step 3: Cross multiply
   1,086.79x = 1,627.56 × 623.16
4. Step 4: Simplify right side
   1,086.79x = 1,014,230.29
5. Step 5: Solve for x
   x = 1,014,230.29/1,086.79
6. Step 6: Final answer
   x = 933.23