Finding the Fourth Proportional to 1,359.87, 2,038.59 and 1,318.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359.87 : 2,038.59 = 1,318.56 : x
2. Step 2: Convert to fraction form
   1,359.87/2,038.59 = 1,318.56/x
3. Step 3: Cross multiply
   1,359.87x = 2,038.59 × 1,318.56
4. Step 4: Simplify right side
   1,359.87x = 2,688,003.23
5. Step 5: Solve for x
   x = 2,688,003.23/1,359.87
6. Step 6: Final answer
   x = 1,976.66