Finding the Fourth Proportional to 111,021.72, 153,026.46 and 82,717.08

Step by Step Solution

1. Step 1: Write the proportion equation
   111,021.72 : 153,026.46 = 82,717.08 : x
2. Step 2: Convert to fraction form
   111,021.72/153,026.46 = 82,717.08/x
3. Step 3: Cross multiply
   111,021.72x = 153,026.46 × 82,717.08
4. Step 4: Simplify right side
   111,021.72x = 12,657,901,933.94
5. Step 5: Solve for x
   x = 12,657,901,933.94/111,021.72
6. Step 6: Final answer
   x = 114,012.84