Finding the Fourth Proportional to 259,315.88, 389,015.32 and 109,557.56

Step by Step Solution

1. Step 1: Write the proportion equation
   259,315.88 : 389,015.32 = 109,557.56 : x
2. Step 2: Convert to fraction form
   259,315.88/389,015.32 = 109,557.56/x
3. Step 3: Cross multiply
   259,315.88x = 389,015.32 × 109,557.56
4. Step 4: Simplify right side
   259,315.88x = 42,619,569,261.82
5. Step 5: Solve for x
   x = 42,619,569,261.82/259,315.88
6. Step 6: Final answer
   x = 164,353.87