Finding the Fourth Proportional to 2,015.00, 2,780.67 and 1,130.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.00 : 2,780.67 = 1,130.78 : x
2. Step 2: Convert to fraction form
   2,015.00/2,780.67 = 1,130.78/x
3. Step 3: Cross multiply
   2,015.00x = 2,780.67 × 1,130.78
4. Step 4: Simplify right side
   2,015.00x = 3,144,312.12
5. Step 5: Solve for x
   x = 3,144,312.12/2,015.00
6. Step 6: Final answer
   x = 1,560.46