Finding the Third Proportional to 54,728.16 and 69,930.84

Step by Step Solution

1. Step 1: Write the proportion equation
   54,728.16 : 69,930.84 = 69,930.84 : x
2. Step 2: Convert to fraction form
   54,728.16/69,930.84 = 69,930.84/x
3. Step 3: Cross multiply
   54,728.16x = 69,930.84 × 69,930.84
4. Step 4: Simplify right side
   54,728.16x = 4,890,322,907.59
5. Step 5: Solve for x
   x = 4,890,322,907.59/54,728.16
6. Step 6: Final answer
   x = 89,356.62