Finding the Fourth Proportional to 259,728.56, 389,297.55 and 109,875.32

Step by Step Solution

1. Step 1: Write the proportion equation
   259,728.56 : 389,297.55 = 109,875.32 : x
2. Step 2: Convert to fraction form
   259,728.56/389,297.55 = 109,875.32/x
3. Step 3: Cross multiply
   259,728.56x = 389,297.55 × 109,875.32
4. Step 4: Simplify right side
   259,728.56x = 42,774,192,881.47
5. Step 5: Solve for x
   x = 42,774,192,881.47/259,728.56
6. Step 6: Final answer
   x = 164,688.06