Finding the Fourth Proportional to 280,116.63, 386,557.56 and 152,789.49

Step by Step Solution

1. Step 1: Write the proportion equation
   280,116.63 : 386,557.56 = 152,789.49 : x
2. Step 2: Convert to fraction form
   280,116.63/386,557.56 = 152,789.49/x
3. Step 3: Cross multiply
   280,116.63x = 386,557.56 × 152,789.49
4. Step 4: Simplify right side
   280,116.63x = 59,061,932,448.04
5. Step 5: Solve for x
   x = 59,061,932,448.04/280,116.63
6. Step 6: Final answer
   x = 210,847.65