Finding the Fourth Proportional to 1,013.83, 1,519.49 and 807.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,013.83 : 1,519.49 = 807.55 : x
2. Step 2: Convert to fraction form
   1,013.83/1,519.49 = 807.55/x
3. Step 3: Cross multiply
   1,013.83x = 1,519.49 × 807.55
4. Step 4: Simplify right side
   1,013.83x = 1,227,052.51
5. Step 5: Solve for x
   x = 1,227,052.51/1,013.83
6. Step 6: Final answer
   x = 1,210.32