Finding the Fourth Proportional to 1,200.37, 1,656.43 and 669.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.37 : 1,656.43 = 669.20 : x
2. Step 2: Convert to fraction form
   1,200.37/1,656.43 = 669.20/x
3. Step 3: Cross multiply
   1,200.37x = 1,656.43 × 669.20
4. Step 4: Simplify right side
   1,200.37x = 1,108,482.96
5. Step 5: Solve for x
   x = 1,108,482.96/1,200.37
6. Step 6: Final answer
   x = 923.45