Finding the Fourth Proportional to 1,003.05, 1,507.82 and 998.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.05 : 1,507.82 = 998.19 : x
2. Step 2: Convert to fraction form
   1,003.05/1,507.82 = 998.19/x
3. Step 3: Cross multiply
   1,003.05x = 1,507.82 × 998.19
4. Step 4: Simplify right side
   1,003.05x = 1,505,085.85
5. Step 5: Solve for x
   x = 1,505,085.85/1,003.05
6. Step 6: Final answer
   x = 1,500.51