Finding the Fourth Proportional to 85,401.61, 128,033.17 and 35,519.02

Step by Step Solution

1. Step 1: Write the proportion equation
   85,401.61 : 128,033.17 = 35,519.02 : x
2. Step 2: Convert to fraction form
   85,401.61/128,033.17 = 35,519.02/x
3. Step 3: Cross multiply
   85,401.61x = 128,033.17 × 35,519.02
4. Step 4: Simplify right side
   85,401.61x = 4,547,612,317.01
5. Step 5: Solve for x
   x = 4,547,612,317.01/85,401.61
6. Step 6: Final answer
   x = 53,249.73