Finding the Fourth Proportional to 1,502.18, 2,241.78 and 1,338.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,502.18 : 2,241.78 = 1,338.15 : x
2. Step 2: Convert to fraction form
   1,502.18/2,241.78 = 1,338.15/x
3. Step 3: Cross multiply
   1,502.18x = 2,241.78 × 1,338.15
4. Step 4: Simplify right side
   1,502.18x = 2,999,837.91
5. Step 5: Solve for x
   x = 2,999,837.91/1,502.18
6. Step 6: Final answer
   x = 1,997.00