Finding the Fourth Proportional to 1,009.98, 1,393.79 and 656.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,009.98 : 1,393.79 = 656.06 : x
2. Step 2: Convert to fraction form
   1,009.98/1,393.79 = 656.06/x
3. Step 3: Cross multiply
   1,009.98x = 1,393.79 × 656.06
4. Step 4: Simplify right side
   1,009.98x = 914,399.62
5. Step 5: Solve for x
   x = 914,399.62/1,009.98
6. Step 6: Final answer
   x = 905.36