Finding the Fourth Proportional to 938.72, 1,409.01 and 694.52

Step by Step Solution

1. Step 1: Write the proportion equation
   938.72 : 1,409.01 = 694.52 : x
2. Step 2: Convert to fraction form
   938.72/1,409.01 = 694.52/x
3. Step 3: Cross multiply
   938.72x = 1,409.01 × 694.52
4. Step 4: Simplify right side
   938.72x = 978,585.63
5. Step 5: Solve for x
   x = 978,585.63/938.72
6. Step 6: Final answer
   x = 1,042.47