Finding the Fourth Proportional to 280,103.67, 386,537.67 and 152,780.18

Step by Step Solution

1. Step 1: Write the proportion equation
   280,103.67 : 386,537.67 = 152,780.18 : x
2. Step 2: Convert to fraction form
   280,103.67/386,537.67 = 152,780.18/x
3. Step 3: Cross multiply
   280,103.67x = 386,537.67 × 152,780.18
4. Step 4: Simplify right side
   280,103.67x = 59,055,292,866.69
5. Step 5: Solve for x
   x = 59,055,292,866.69/280,103.67
6. Step 6: Final answer
   x = 210,833.70