Finding the Fourth Proportional to 285,687.69, 428,560.71 and 98,674.89

Step by Step Solution

1. Step 1: Write the proportion equation
   285,687.69 : 428,560.71 = 98,674.89 : x
2. Step 2: Convert to fraction form
   285,687.69/428,560.71 = 98,674.89/x
3. Step 3: Cross multiply
   285,687.69x = 428,560.71 × 98,674.89
4. Step 4: Simplify right side
   285,687.69x = 42,288,180,917.57
5. Step 5: Solve for x
   x = 42,288,180,917.57/285,687.69
6. Step 6: Final answer
   x = 148,022.41