Finding the Fourth Proportional to 498,725.98, 688,258.82 and 294,951.57

Step by Step Solution

1. Step 1: Write the proportion equation
   498,725.98 : 688,258.82 = 294,951.57 : x
2. Step 2: Convert to fraction form
   498,725.98/688,258.82 = 294,951.57/x
3. Step 3: Cross multiply
   498,725.98x = 688,258.82 × 294,951.57
4. Step 4: Simplify right side
   498,725.98x = 203,003,017,681.76
5. Step 5: Solve for x
   x = 203,003,017,681.76/498,725.98
6. Step 6: Final answer
   x = 407,043.20