Finding the Fourth Proportional to 145,498.48, 200,757.69 and 85,057.29

Step by Step Solution

1. Step 1: Write the proportion equation
   145,498.48 : 200,757.69 = 85,057.29 : x
2. Step 2: Convert to fraction form
   145,498.48/200,757.69 = 85,057.29/x
3. Step 3: Cross multiply
   145,498.48x = 200,757.69 × 85,057.29
4. Step 4: Simplify right side
   145,498.48x = 17,075,905,058.06
5. Step 5: Solve for x
   x = 17,075,905,058.06/145,498.48
6. Step 6: Final answer
   x = 117,361.40