Finding the Fourth Proportional to 2,085.32, 3,127.34 and 1,719.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.32 : 3,127.34 = 1,719.20 : x
2. Step 2: Convert to fraction form
   2,085.32/3,127.34 = 1,719.20/x
3. Step 3: Cross multiply
   2,085.32x = 3,127.34 × 1,719.20
4. Step 4: Simplify right side
   2,085.32x = 5,376,522.93
5. Step 5: Solve for x
   x = 5,376,522.93/2,085.32
6. Step 6: Final answer
   x = 2,578.27