Finding the Fourth Proportional to 1,123.34, 1,686.22 and 637.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.34 : 1,686.22 = 637.34 : x
2. Step 2: Convert to fraction form
   1,123.34/1,686.22 = 637.34/x
3. Step 3: Cross multiply
   1,123.34x = 1,686.22 × 637.34
4. Step 4: Simplify right side
   1,123.34x = 1,074,695.45
5. Step 5: Solve for x
   x = 1,074,695.45/1,123.34
6. Step 6: Final answer
   x = 956.70