Finding the Fourth Proportional to 245,454.98, 368,018.42 and 198,128.30

Step by Step Solution

1. Step 1: Write the proportion equation
   245,454.98 : 368,018.42 = 198,128.30 : x
2. Step 2: Convert to fraction form
   245,454.98/368,018.42 = 198,128.30/x
3. Step 3: Cross multiply
   245,454.98x = 368,018.42 × 198,128.30
4. Step 4: Simplify right side
   245,454.98x = 72,914,861,092.55
5. Step 5: Solve for x
   x = 72,914,861,092.55/245,454.98
6. Step 6: Final answer
   x = 297,060.03