Finding the Fourth Proportional to 280,106.57, 386,551.69 and 152,782.18

Step by Step Solution

1. Step 1: Write the proportion equation
   280,106.57 : 386,551.69 = 152,782.18 : x
2. Step 2: Convert to fraction form
   280,106.57/386,551.69 = 152,782.18/x
3. Step 3: Cross multiply
   280,106.57x = 386,551.69 × 152,782.18
4. Step 4: Simplify right side
   280,106.57x = 59,058,208,532.55
5. Step 5: Solve for x
   x = 59,058,208,532.55/280,106.57
6. Step 6: Final answer
   x = 210,841.92