Finding the Fourth Proportional to 2,071.28, 3,099.63 and 1,580.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.28 : 3,099.63 = 1,580.42 : x
2. Step 2: Convert to fraction form
   2,071.28/3,099.63 = 1,580.42/x
3. Step 3: Cross multiply
   2,071.28x = 3,099.63 × 1,580.42
4. Step 4: Simplify right side
   2,071.28x = 4,898,717.24
5. Step 5: Solve for x
   x = 4,898,717.24/2,071.28
6. Step 6: Final answer
   x = 2,365.07