Finding the Fourth Proportional to 2,071.78, 3,101.55 and 1,590.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.78 : 3,101.55 = 1,590.46 : x
2. Step 2: Convert to fraction form
   2,071.78/3,101.55 = 1,590.46/x
3. Step 3: Cross multiply
   2,071.78x = 3,101.55 × 1,590.46
4. Step 4: Simplify right side
   2,071.78x = 4,932,891.21
5. Step 5: Solve for x
   x = 4,932,891.21/2,071.78
6. Step 6: Final answer
   x = 2,380.99