Finding the Fourth Proportional to 3,490.83, 4,815.72 and 2,164.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,490.83 : 4,815.72 = 2,164.05 : x
2. Step 2: Convert to fraction form
   3,490.83/4,815.72 = 2,164.05/x
3. Step 3: Cross multiply
   3,490.83x = 4,815.72 × 2,164.05
4. Step 4: Simplify right side
   3,490.83x = 10,421,458.87
5. Step 5: Solve for x
   x = 10,421,458.87/3,490.83
6. Step 6: Final answer
   x = 2,985.38