Finding the Fourth Proportional to 1,359.17, 1,875.71 and 769.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359.17 : 1,875.71 = 769.67 : x
2. Step 2: Convert to fraction form
   1,359.17/1,875.71 = 769.67/x
3. Step 3: Cross multiply
   1,359.17x = 1,875.71 × 769.67
4. Step 4: Simplify right side
   1,359.17x = 1,443,673.87
5. Step 5: Solve for x
   x = 1,443,673.87/1,359.17
6. Step 6: Final answer
   x = 1,062.17