Finding the Fourth Proportional to 1,200.42, 1,656.52 and 669.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.42 : 1,656.52 = 669.34 : x
2. Step 2: Convert to fraction form
   1,200.42/1,656.52 = 669.34/x
3. Step 3: Cross multiply
   1,200.42x = 1,656.52 × 669.34
4. Step 4: Simplify right side
   1,200.42x = 1,108,775.10
5. Step 5: Solve for x
   x = 1,108,775.10/1,200.42
6. Step 6: Final answer
   x = 923.66