Finding the Fourth Proportional to 1,086.23, 1,628.01 and 617.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.23 : 1,628.01 = 617.67 : x
2. Step 2: Convert to fraction form
   1,086.23/1,628.01 = 617.67/x
3. Step 3: Cross multiply
   1,086.23x = 1,628.01 × 617.67
4. Step 4: Simplify right side
   1,086.23x = 1,005,572.94
5. Step 5: Solve for x
   x = 1,005,572.94/1,086.23
6. Step 6: Final answer
   x = 925.74