Finding the Fourth Proportional to 1,331.82, 1,998.69 and 510.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,331.82 : 1,998.69 = 510.30 : x
2. Step 2: Convert to fraction form
   1,331.82/1,998.69 = 510.30/x
3. Step 3: Cross multiply
   1,331.82x = 1,998.69 × 510.30
4. Step 4: Simplify right side
   1,331.82x = 1,019,931.51
5. Step 5: Solve for x
   x = 1,019,931.51/1,331.82
6. Step 6: Final answer
   x = 765.82