Finding the Fourth Proportional to 354,471.18, 489,150.78 and 201,488.10

Step by Step Solution

1. Step 1: Write the proportion equation
   354,471.18 : 489,150.78 = 201,488.10 : x
2. Step 2: Convert to fraction form
   354,471.18/489,150.78 = 201,488.10/x
3. Step 3: Cross multiply
   354,471.18x = 489,150.78 × 201,488.10
4. Step 4: Simplify right side
   354,471.18x = 98,558,061,275.72
5. Step 5: Solve for x
   x = 98,558,061,275.72/354,471.18
6. Step 6: Final answer
   x = 278,042.52