Finding the Fourth Proportional to 2,071.72, 3,102.51 and 1,339.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.72 : 3,102.51 = 1,339.09 : x
2. Step 2: Convert to fraction form
   2,071.72/3,102.51 = 1,339.09/x
3. Step 3: Cross multiply
   2,071.72x = 3,102.51 × 1,339.09
4. Step 4: Simplify right side
   2,071.72x = 4,154,540.12
5. Step 5: Solve for x
   x = 4,154,540.12/2,071.72
6. Step 6: Final answer
   x = 2,005.36