Finding the Fourth Proportional to 2,059.84, 3,086.40 and 1,646.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,059.84 : 3,086.40 = 1,646.80 : x
2. Step 2: Convert to fraction form
   2,059.84/3,086.40 = 1,646.80/x
3. Step 3: Cross multiply
   2,059.84x = 3,086.40 × 1,646.80
4. Step 4: Simplify right side
   2,059.84x = 5,082,683.52
5. Step 5: Solve for x
   x = 5,082,683.52/2,059.84
6. Step 6: Final answer
   x = 2,467.51