Finding the Fourth Proportional to 113,805.76, 157,028.52 and 65,398.32

Step by Step Solution

1. Step 1: Write the proportion equation
   113,805.76 : 157,028.52 = 65,398.32 : x
2. Step 2: Convert to fraction form
   113,805.76/157,028.52 = 65,398.32/x
3. Step 3: Cross multiply
   113,805.76x = 157,028.52 × 65,398.32
4. Step 4: Simplify right side
   113,805.76x = 10,269,401,400.09
5. Step 5: Solve for x
   x = 10,269,401,400.09/113,805.76
6. Step 6: Final answer
   x = 90,236.22