Finding the Fourth Proportional to 1,200.16, 1,656.03 and 668.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.16 : 1,656.03 = 668.94 : x
2. Step 2: Convert to fraction form
   1,200.16/1,656.03 = 668.94/x
3. Step 3: Cross multiply
   1,200.16x = 1,656.03 × 668.94
4. Step 4: Simplify right side
   1,200.16x = 1,107,784.71
5. Step 5: Solve for x
   x = 1,107,784.71/1,200.16
6. Step 6: Final answer
   x = 923.03