Finding the Fourth Proportional to 360,915.78, 498,020.00 and 208,003.48

Step by Step Solution

1. Step 1: Write the proportion equation
   360,915.78 : 498,020.00 = 208,003.48 : x
2. Step 2: Convert to fraction form
   360,915.78/498,020.00 = 208,003.48/x
3. Step 3: Cross multiply
   360,915.78x = 498,020.00 × 208,003.48
4. Step 4: Simplify right side
   360,915.78x = 103,589,890,824.53
5. Step 5: Solve for x
   x = 103,589,890,824.53/360,915.78
6. Step 6: Final answer
   x = 287,019.56