Finding the Fourth Proportional to 89,665.09, 123,738.20 and 51,426.12

Step by Step Solution

1. Step 1: Write the proportion equation
   89,665.09 : 123,738.20 = 51,426.12 : x
2. Step 2: Convert to fraction form
   89,665.09/123,738.20 = 51,426.12/x
3. Step 3: Cross multiply
   89,665.09x = 123,738.20 × 51,426.12
4. Step 4: Simplify right side
   89,665.09x = 6,363,374,645.96
5. Step 5: Solve for x
   x = 6,363,374,645.96/89,665.09
6. Step 6: Final answer
   x = 70,968.25