Finding the Fourth Proportional to 115,459.31, 159,443.89 and 109,169.28

Step by Step Solution

1. Step 1: Write the proportion equation
   115,459.31 : 159,443.89 = 109,169.28 : x
2. Step 2: Convert to fraction form
   115,459.31/159,443.89 = 109,169.28/x
3. Step 3: Cross multiply
   115,459.31x = 159,443.89 × 109,169.28
4. Step 4: Simplify right side
   115,459.31x = 17,406,374,398.78
5. Step 5: Solve for x
   x = 17,406,374,398.78/115,459.31
6. Step 6: Final answer
   x = 150,757.65