Finding the Fourth Proportional to 2,013.67, 3,018.76 and 780.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,013.67 : 3,018.76 = 780.23 : x
2. Step 2: Convert to fraction form
   2,013.67/3,018.76 = 780.23/x
3. Step 3: Cross multiply
   2,013.67x = 3,018.76 × 780.23
4. Step 4: Simplify right side
   2,013.67x = 2,355,327.11
5. Step 5: Solve for x
   x = 2,355,327.11/2,013.67
6. Step 6: Final answer
   x = 1,169.67