Finding the Fourth Proportional to 280,978.39, 387,753.24 and 153,651.25

Step by Step Solution

1. Step 1: Write the proportion equation
   280,978.39 : 387,753.24 = 153,651.25 : x
2. Step 2: Convert to fraction form
   280,978.39/387,753.24 = 153,651.25/x
3. Step 3: Cross multiply
   280,978.39x = 387,753.24 × 153,651.25
4. Step 4: Simplify right side
   280,978.39x = 59,578,770,017.55
5. Step 5: Solve for x
   x = 59,578,770,017.55/280,978.39
6. Step 6: Final answer
   x = 212,040.40