Finding the Fourth Proportional to 1,128.34, 1,556.94 and 662.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128.34 : 1,556.94 = 662.50 : x
2. Step 2: Convert to fraction form
   1,128.34/1,556.94 = 662.50/x
3. Step 3: Cross multiply
   1,128.34x = 1,556.94 × 662.50
4. Step 4: Simplify right side
   1,128.34x = 1,031,472.75
5. Step 5: Solve for x
   x = 1,031,472.75/1,128.34
6. Step 6: Final answer
   x = 914.15