Finding the Fourth Proportional to 1,359.45, 1,876.05 and 769.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359.45 : 1,876.05 = 769.87 : x
2. Step 2: Convert to fraction form
   1,359.45/1,876.05 = 769.87/x
3. Step 3: Cross multiply
   1,359.45x = 1,876.05 × 769.87
4. Step 4: Simplify right side
   1,359.45x = 1,444,314.61
5. Step 5: Solve for x
   x = 1,444,314.61/1,359.45
6. Step 6: Final answer
   x = 1,062.43