Finding the Fourth Proportional to 287,786.89, 431,680.02 and 98,231.52

Step by Step Solution

1. Step 1: Write the proportion equation
   287,786.89 : 431,680.02 = 98,231.52 : x
2. Step 2: Convert to fraction form
   287,786.89/431,680.02 = 98,231.52/x
3. Step 3: Cross multiply
   287,786.89x = 431,680.02 × 98,231.52
4. Step 4: Simplify right side
   287,786.89x = 42,404,586,321.21
5. Step 5: Solve for x
   x = 42,404,586,321.21/287,786.89
6. Step 6: Final answer
   x = 147,347.18