Finding the Fourth Proportional to 1,318.05, 1,818.86 and 758.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,318.05 : 1,818.86 = 758.72 : x
2. Step 2: Convert to fraction form
   1,318.05/1,818.86 = 758.72/x
3. Step 3: Cross multiply
   1,318.05x = 1,818.86 × 758.72
4. Step 4: Simplify right side
   1,318.05x = 1,380,006.21
5. Step 5: Solve for x
   x = 1,380,006.21/1,318.05
6. Step 6: Final answer
   x = 1,047.01