Finding the Fourth Proportional to 59,928, 89,436.28 and 53,285.20

Step by Step Solution

1. Step 1: Write the proportion equation
   59,928 : 89,436.28 = 53,285.20 : x
2. Step 2: Convert to fraction form
   59,928/89,436.28 = 53,285.20/x
3. Step 3: Cross multiply
   59,928x = 89,436.28 × 53,285.20
4. Step 4: Simplify right side
   59,928x = 4,765,630,067.06
5. Step 5: Solve for x
   x = 4,765,630,067.06/59,928
6. Step 6: Final answer
   x = 79,522.59