Finding the Fourth Proportional to 1,009.18, 1,506.37 and 938.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,009.18 : 1,506.37 = 938.69 : x
2. Step 2: Convert to fraction form
   1,009.18/1,506.37 = 938.69/x
3. Step 3: Cross multiply
   1,009.18x = 1,506.37 × 938.69
4. Step 4: Simplify right side
   1,009.18x = 1,414,014.63
5. Step 5: Solve for x
   x = 1,414,014.63/1,009.18
6. Step 6: Final answer
   x = 1,401.15