Finding the Fourth Proportional to 280,410.39, 386,951.69 and 153,061.38

Step by Step Solution

1. Step 1: Write the proportion equation
   280,410.39 : 386,951.69 = 153,061.38 : x
2. Step 2: Convert to fraction form
   280,410.39/386,951.69 = 153,061.38/x
3. Step 3: Cross multiply
   280,410.39x = 386,951.69 × 153,061.38
4. Step 4: Simplify right side
   280,410.39x = 59,227,359,664.73
5. Step 5: Solve for x
   x = 59,227,359,664.73/280,410.39
6. Step 6: Final answer
   x = 211,216.71