Finding the Fourth Proportional to 3,911.55, 5,869.22 and 1,719.99

Step by Step Solution

1. Step 1: Write the proportion equation
   3,911.55 : 5,869.22 = 1,719.99 : x
2. Step 2: Convert to fraction form
   3,911.55/5,869.22 = 1,719.99/x
3. Step 3: Cross multiply
   3,911.55x = 5,869.22 × 1,719.99
4. Step 4: Simplify right side
   3,911.55x = 10,094,999.71
5. Step 5: Solve for x
   x = 10,094,999.71/3,911.55
6. Step 6: Final answer
   x = 2,580.82