Finding the Fourth Proportional to 151,546.89, 209,026.56 and 128,727.57

Step by Step Solution

1. Step 1: Write the proportion equation
   151,546.89 : 209,026.56 = 128,727.57 : x
2. Step 2: Convert to fraction form
   151,546.89/209,026.56 = 128,727.57/x
3. Step 3: Cross multiply
   151,546.89x = 209,026.56 × 128,727.57
4. Step 4: Simplify right side
   151,546.89x = 26,907,481,134.26
5. Step 5: Solve for x
   x = 26,907,481,134.26/151,546.89
6. Step 6: Final answer
   x = 177,552.18