Finding the Fourth Proportional to 1,527.17, 2,107.89 and 938.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,527.17 : 2,107.89 = 938.21 : x
2. Step 2: Convert to fraction form
   1,527.17/2,107.89 = 938.21/x
3. Step 3: Cross multiply
   1,527.17x = 2,107.89 × 938.21
4. Step 4: Simplify right side
   1,527.17x = 1,977,632.94
5. Step 5: Solve for x
   x = 1,977,632.94/1,527.17
6. Step 6: Final answer
   x = 1,294.97