Finding the Fourth Proportional to 2,013.02, 3,020.71 and 780.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,013.02 : 3,020.71 = 780.36 : x
2. Step 2: Convert to fraction form
   2,013.02/3,020.71 = 780.36/x
3. Step 3: Cross multiply
   2,013.02x = 3,020.71 × 780.36
4. Step 4: Simplify right side
   2,013.02x = 2,357,241.26
5. Step 5: Solve for x
   x = 2,357,241.26/2,013.02
6. Step 6: Final answer
   x = 1,171.00