Finding the Fourth Proportional to 2,071.73, 3,109.19 and 839.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.73 : 3,109.19 = 839.93 : x
2. Step 2: Convert to fraction form
   2,071.73/3,109.19 = 839.93/x
3. Step 3: Cross multiply
   2,071.73x = 3,109.19 × 839.93
4. Step 4: Simplify right side
   2,071.73x = 2,611,501.96
5. Step 5: Solve for x
   x = 2,611,501.96/2,071.73
6. Step 6: Final answer
   x = 1,260.54