Finding the Fourth Proportional to 115,845, 159,876 and 65,553.72

Step by Step Solution

1. Step 1: Write the proportion equation
   115,845 : 159,876 = 65,553.72 : x
2. Step 2: Convert to fraction form
   115,845/159,876 = 65,553.72/x
3. Step 3: Cross multiply
   115,845x = 159,876 × 65,553.72
4. Step 4: Simplify right side
   115,845x = 10,480,466,538.72
5. Step 5: Solve for x
   x = 10,480,466,538.72/115,845
6. Step 6: Final answer
   x = 90,469.74