Finding the Fourth Proportional to 1,200.50, 1,656.59 and 669.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.50 : 1,656.59 = 669.32 : x
2. Step 2: Convert to fraction form
   1,200.50/1,656.59 = 669.32/x
3. Step 3: Cross multiply
   1,200.50x = 1,656.59 × 669.32
4. Step 4: Simplify right side
   1,200.50x = 1,108,794.63
5. Step 5: Solve for x
   x = 1,108,794.63/1,200.50
6. Step 6: Final answer
   x = 923.61