Finding the Fourth Proportional to 1,527.81, 2,107.28 and 938.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,527.81 : 2,107.28 = 938.67 : x
2. Step 2: Convert to fraction form
   1,527.81/2,107.28 = 938.67/x
3. Step 3: Cross multiply
   1,527.81x = 2,107.28 × 938.67
4. Step 4: Simplify right side
   1,527.81x = 1,978,035.82
5. Step 5: Solve for x
   x = 1,978,035.82/1,527.81
6. Step 6: Final answer
   x = 1,294.69