Finding the Fourth Proportional to 89,685, 123,765.30 and 51,981.12

Step by Step Solution

1. Step 1: Write the proportion equation
   89,685 : 123,765.30 = 51,981.12 : x
2. Step 2: Convert to fraction form
   89,685/123,765.30 = 51,981.12/x
3. Step 3: Cross multiply
   89,685x = 123,765.30 × 51,981.12
4. Step 4: Simplify right side
   89,685x = 6,433,458,911.14
5. Step 5: Solve for x
   x = 6,433,458,911.14/89,685
6. Step 6: Final answer
   x = 71,733.95