Finding the Fourth Proportional to 282,022.57, 422,811.98 and 139,770.10

Step by Step Solution

1. Step 1: Write the proportion equation
   282,022.57 : 422,811.98 = 139,770.10 : x
2. Step 2: Convert to fraction form
   282,022.57/422,811.98 = 139,770.10/x
3. Step 3: Cross multiply
   282,022.57x = 422,811.98 × 139,770.10
4. Step 4: Simplify right side
   282,022.57x = 59,096,472,725.80
5. Step 5: Solve for x
   x = 59,096,472,725.80/282,022.57
6. Step 6: Final answer
   x = 209,545.19