Finding the Fourth Proportional to 280,410.33, 386,951.61 and 153,061.32

Step by Step Solution

1. Step 1: Write the proportion equation
   280,410.33 : 386,951.61 = 153,061.32 : x
2. Step 2: Convert to fraction form
   280,410.33/386,951.61 = 153,061.32/x
3. Step 3: Cross multiply
   280,410.33x = 386,951.61 × 153,061.32
4. Step 4: Simplify right side
   280,410.33x = 59,227,324,202.73
5. Step 5: Solve for x
   x = 59,227,324,202.73/280,410.33
6. Step 6: Final answer
   x = 211,216.63