Finding the Fourth Proportional to 3,619.88, 5,423.61 and 1,977.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,619.88 : 5,423.61 = 1,977.57 : x
2. Step 2: Convert to fraction form
   3,619.88/5,423.61 = 1,977.57/x
3. Step 3: Cross multiply
   3,619.88x = 5,423.61 × 1,977.57
4. Step 4: Simplify right side
   3,619.88x = 10,725,568.43
5. Step 5: Solve for x
   x = 10,725,568.43/3,619.88
6. Step 6: Final answer
   x = 2,962.96