Finding the Fourth Proportional to 2,164.22, 2,986.17 and 1,377.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,164.22 : 2,986.17 = 1,377.98 : x
2. Step 2: Convert to fraction form
   2,164.22/2,986.17 = 1,377.98/x
3. Step 3: Cross multiply
   2,164.22x = 2,986.17 × 1,377.98
4. Step 4: Simplify right side
   2,164.22x = 4,114,882.54
5. Step 5: Solve for x
   x = 4,114,882.54/2,164.22
6. Step 6: Final answer
   x = 1,901.32