Finding the Fourth Proportional to 115,426, 159,297.60 and 65,134.72

Step by Step Solution

1. Step 1: Write the proportion equation
   115,426 : 159,297.60 = 65,134.72 : x
2. Step 2: Convert to fraction form
   115,426/159,297.60 = 65,134.72/x
3. Step 3: Cross multiply
   115,426x = 159,297.60 × 65,134.72
4. Step 4: Simplify right side
   115,426x = 10,375,804,572.67
5. Step 5: Solve for x
   x = 10,375,804,572.67/115,426
6. Step 6: Final answer
   x = 89,891.40