Finding the Fourth Proportional to 2,145.60, 3,211.56 and 1,707.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,145.60 : 3,211.56 = 1,707.84 : x
2. Step 2: Convert to fraction form
   2,145.60/3,211.56 = 1,707.84/x
3. Step 3: Cross multiply
   2,145.60x = 3,211.56 × 1,707.84
4. Step 4: Simplify right side
   2,145.60x = 5,484,830.63
5. Step 5: Solve for x
   x = 5,484,830.63/2,145.60
6. Step 6: Final answer
   x = 2,556.32