Finding the Fourth Proportional to 1,107.16, 1,527.60 and 714.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,107.16 : 1,527.60 = 714.72 : x
2. Step 2: Convert to fraction form
   1,107.16/1,527.60 = 714.72/x
3. Step 3: Cross multiply
   1,107.16x = 1,527.60 × 714.72
4. Step 4: Simplify right side
   1,107.16x = 1,091,806.27
5. Step 5: Solve for x
   x = 1,091,806.27/1,107.16
6. Step 6: Final answer
   x = 986.13