Finding the Fourth Proportional to 1,019.92, 1,407.50 and 554.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.92 : 1,407.50 = 554.17 : x
2. Step 2: Convert to fraction form
   1,019.92/1,407.50 = 554.17/x
3. Step 3: Cross multiply
   1,019.92x = 1,407.50 × 554.17
4. Step 4: Simplify right side
   1,019.92x = 779,994.28
5. Step 5: Solve for x
   x = 779,994.28/1,019.92
6. Step 6: Final answer
   x = 764.76