Finding the Fourth Proportional to 64,891, 89,468.46 and 54,151.30

Step by Step Solution

1. Step 1: Write the proportion equation
   64,891 : 89,468.46 = 54,151.30 : x
2. Step 2: Convert to fraction form
   64,891/89,468.46 = 54,151.30/x
3. Step 3: Cross multiply
   64,891x = 89,468.46 × 54,151.30
4. Step 4: Simplify right side
   64,891x = 4,844,833,418.00
5. Step 5: Solve for x
   x = 4,844,833,418.00/64,891
6. Step 6: Final answer
   x = 74,661.10