Finding the Fourth Proportional to 89,685.50, 123,765.99 and 51,981.62

Step by Step Solution

1. Step 1: Write the proportion equation
   89,685.50 : 123,765.99 = 51,981.62 : x
2. Step 2: Convert to fraction form
   89,685.50/123,765.99 = 51,981.62/x
3. Step 3: Cross multiply
   89,685.50x = 123,765.99 × 51,981.62
4. Step 4: Simplify right side
   89,685.50x = 6,433,556,661.10
5. Step 5: Solve for x
   x = 6,433,556,661.10/89,685.50
6. Step 6: Final answer
   x = 71,734.64