Finding the Fourth Proportional to 1,487.08, 2,229.18 and 757.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,487.08 : 2,229.18 = 757.72 : x
2. Step 2: Convert to fraction form
   1,487.08/2,229.18 = 757.72/x
3. Step 3: Cross multiply
   1,487.08x = 2,229.18 × 757.72
4. Step 4: Simplify right side
   1,487.08x = 1,689,094.27
5. Step 5: Solve for x
   x = 1,689,094.27/1,487.08
6. Step 6: Final answer
   x = 1,135.85