Finding the Fourth Proportional to 2,012.60, 3,019.20 and 713.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.60 : 3,019.20 = 713.96 : x
2. Step 2: Convert to fraction form
   2,012.60/3,019.20 = 713.96/x
3. Step 3: Cross multiply
   2,012.60x = 3,019.20 × 713.96
4. Step 4: Simplify right side
   2,012.60x = 2,155,588.03
5. Step 5: Solve for x
   x = 2,155,588.03/2,012.60
6. Step 6: Final answer
   x = 1,071.05