Finding the Fourth Proportional to 200,153.52, 276,395.52 and 128,658.06

Step by Step Solution

1. Step 1: Write the proportion equation
   200,153.52 : 276,395.52 = 128,658.06 : x
2. Step 2: Convert to fraction form
   200,153.52/276,395.52 = 128,658.06/x
3. Step 3: Cross multiply
   200,153.52x = 276,395.52 × 128,658.06
4. Step 4: Simplify right side
   200,153.52x = 35,560,511,395.89
5. Step 5: Solve for x
   x = 35,560,511,395.89/200,153.52
6. Step 6: Final answer
   x = 177,666.18