Finding the Fourth Proportional to 89,665.67, 123,738.98 and 53,856.29

Step by Step Solution

1. Step 1: Write the proportion equation
   89,665.67 : 123,738.98 = 53,856.29 : x
2. Step 2: Convert to fraction form
   89,665.67/123,738.98 = 53,856.29/x
3. Step 3: Cross multiply
   89,665.67x = 123,738.98 × 53,856.29
4. Step 4: Simplify right side
   89,665.67x = 6,664,121,503.21
5. Step 5: Solve for x
   x = 6,664,121,503.21/89,665.67
6. Step 6: Final answer
   x = 74,321.89