Finding the Fourth Proportional to 1,192.52, 1,645.72 and 668.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,192.52 : 1,645.72 = 668.60 : x
2. Step 2: Convert to fraction form
   1,192.52/1,645.72 = 668.60/x
3. Step 3: Cross multiply
   1,192.52x = 1,645.72 × 668.60
4. Step 4: Simplify right side
   1,192.52x = 1,100,328.39
5. Step 5: Solve for x
   x = 1,100,328.39/1,192.52
6. Step 6: Final answer
   x = 922.69