Finding the Fourth Proportional to 3,599.59, 5,395.69 and 1,377.90

Step by Step Solution

1. Step 1: Write the proportion equation
   3,599.59 : 5,395.69 = 1,377.90 : x
2. Step 2: Convert to fraction form
   3,599.59/5,395.69 = 1,377.90/x
3. Step 3: Cross multiply
   3,599.59x = 5,395.69 × 1,377.90
4. Step 4: Simplify right side
   3,599.59x = 7,434,724.22
5. Step 5: Solve for x
   x = 7,434,724.22/3,599.59
6. Step 6: Final answer
   x = 2,065.43