Finding the Fourth Proportional to 64,578.16, 89,081.84 and 60,011.52

Step by Step Solution

1. Step 1: Write the proportion equation
   64,578.16 : 89,081.84 = 60,011.52 : x
2. Step 2: Convert to fraction form
   64,578.16/89,081.84 = 60,011.52/x
3. Step 3: Cross multiply
   64,578.16x = 89,081.84 × 60,011.52
4. Step 4: Simplify right side
   64,578.16x = 5,345,936,622.80
5. Step 5: Solve for x
   x = 5,345,936,622.80/64,578.16
6. Step 6: Final answer
   x = 82,782.42