Finding the Fourth Proportional to 1,128.53, 1,556.93 and 656.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128.53 : 1,556.93 = 656.34 : x
2. Step 2: Convert to fraction form
   1,128.53/1,556.93 = 656.34/x
3. Step 3: Cross multiply
   1,128.53x = 1,556.93 × 656.34
4. Step 4: Simplify right side
   1,128.53x = 1,021,872.15
5. Step 5: Solve for x
   x = 1,021,872.15/1,128.53
6. Step 6: Final answer
   x = 905.49