Finding the Fourth Proportional to 259,326.72, 389,144.16 and 111,582.72

Step by Step Solution

1. Step 1: Write the proportion equation
   259,326.72 : 389,144.16 = 111,582.72 : x
2. Step 2: Convert to fraction form
   259,326.72/389,144.16 = 111,582.72/x
3. Step 3: Cross multiply
   259,326.72x = 389,144.16 × 111,582.72
4. Step 4: Simplify right side
   259,326.72x = 43,421,763,844.92
5. Step 5: Solve for x
   x = 43,421,763,844.92/259,326.72
6. Step 6: Final answer
   x = 167,440.38