Finding the Fourth Proportional to 1,019.83, 1,407.36 and 554.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.83 : 1,407.36 = 554.08 : x
2. Step 2: Convert to fraction form
   1,019.83/1,407.36 = 554.08/x
3. Step 3: Cross multiply
   1,019.83x = 1,407.36 × 554.08
4. Step 4: Simplify right side
   1,019.83x = 779,790.03
5. Step 5: Solve for x
   x = 779,790.03/1,019.83
6. Step 6: Final answer
   x = 764.63