Finding the Fourth Proportional to 89,405.42, 123,278.49 and 65,163.56

Step by Step Solution

1. Step 1: Write the proportion equation
   89,405.42 : 123,278.49 = 65,163.56 : x
2. Step 2: Convert to fraction form
   89,405.42/123,278.49 = 65,163.56/x
3. Step 3: Cross multiply
   89,405.42x = 123,278.49 × 65,163.56
4. Step 4: Simplify right side
   89,405.42x = 8,033,264,663.43
5. Step 5: Solve for x
   x = 8,033,264,663.43/89,405.42
6. Step 6: Final answer
   x = 89,852.10