Finding the Fourth Proportional to 280,172.32, 420,019.60 and 122,282.72

Step by Step Solution

1. Step 1: Write the proportion equation
   280,172.32 : 420,019.60 = 122,282.72 : x
2. Step 2: Convert to fraction form
   280,172.32/420,019.60 = 122,282.72/x
3. Step 3: Cross multiply
   280,172.32x = 420,019.60 × 122,282.72
4. Step 4: Simplify right side
   280,172.32x = 51,361,139,141.31
5. Step 5: Solve for x
   x = 51,361,139,141.31/280,172.32
6. Step 6: Final answer
   x = 183,319.82