Finding the Fourth Proportional to 2,071.80, 3,106.71 and 805.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.80 : 3,106.71 = 805.93 : x
2. Step 2: Convert to fraction form
   2,071.80/3,106.71 = 805.93/x
3. Step 3: Cross multiply
   2,071.80x = 3,106.71 × 805.93
4. Step 4: Simplify right side
   2,071.80x = 2,503,783.02
5. Step 5: Solve for x
   x = 2,503,783.02/2,071.80
6. Step 6: Final answer
   x = 1,208.51