Finding the Fourth Proportional to 1,191.04, 1,643.59 and 659.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.04 : 1,643.59 = 659.94 : x
2. Step 2: Convert to fraction form
   1,191.04/1,643.59 = 659.94/x
3. Step 3: Cross multiply
   1,191.04x = 1,643.59 × 659.94
4. Step 4: Simplify right side
   1,191.04x = 1,084,670.78
5. Step 5: Solve for x
   x = 1,084,670.78/1,191.04
6. Step 6: Final answer
   x = 910.69