Finding the Fourth Proportional to 1,127.72, 1,556.46 and 662

Step by Step Solution

1. Step 1: Write the proportion equation
   1,127.72 : 1,556.46 = 662 : x
2. Step 2: Convert to fraction form
   1,127.72/1,556.46 = 662/x
3. Step 3: Cross multiply
   1,127.72x = 1,556.46 × 662
4. Step 4: Simplify right side
   1,127.72x = 1,030,376.52
5. Step 5: Solve for x
   x = 1,030,376.52/1,127.72
6. Step 6: Final answer
   x = 913.68