Finding the Fourth Proportional to 1,128.06, 1,556.71 and 656.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128.06 : 1,556.71 = 656.05 : x
2. Step 2: Convert to fraction form
   1,128.06/1,556.71 = 656.05/x
3. Step 3: Cross multiply
   1,128.06x = 1,556.71 × 656.05
4. Step 4: Simplify right side
   1,128.06x = 1,021,279.60
5. Step 5: Solve for x
   x = 1,021,279.60/1,128.06
6. Step 6: Final answer
   x = 905.34