Finding the Fourth Proportional to 66,348.72, 91,650.79 and 53,013.49

Step by Step Solution

1. Step 1: Write the proportion equation
   66,348.72 : 91,650.79 = 53,013.49 : x
2. Step 2: Convert to fraction form
   66,348.72/91,650.79 = 53,013.49/x
3. Step 3: Cross multiply
   66,348.72x = 91,650.79 × 53,013.49
4. Step 4: Simplify right side
   66,348.72x = 4,858,728,076.30
5. Step 5: Solve for x
   x = 4,858,728,076.30/66,348.72
6. Step 6: Final answer
   x = 73,230.17