Finding the Fourth Proportional to 89,515.80, 123,522.12 and 51,783

Step by Step Solution

1. Step 1: Write the proportion equation
   89,515.80 : 123,522.12 = 51,783 : x
2. Step 2: Convert to fraction form
   89,515.80/123,522.12 = 51,783/x
3. Step 3: Cross multiply
   89,515.80x = 123,522.12 × 51,783
4. Step 4: Simplify right side
   89,515.80x = 6,396,345,939.96
5. Step 5: Solve for x
   x = 6,396,345,939.96/89,515.80
6. Step 6: Final answer
   x = 71,454.94