Finding the Fourth Proportional to 1,358.72, 1,875.02 and 769.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,358.72 : 1,875.02 = 769.12 : x
2. Step 2: Convert to fraction form
   1,358.72/1,875.02 = 769.12/x
3. Step 3: Cross multiply
   1,358.72x = 1,875.02 × 769.12
4. Step 4: Simplify right side
   1,358.72x = 1,442,115.38
5. Step 5: Solve for x
   x = 1,442,115.38/1,358.72
6. Step 6: Final answer
   x = 1,061.38