Finding the Fourth Proportional to 89,815.32, 123,945.90 and 49,530.48

Step by Step Solution

1. Step 1: Write the proportion equation
   89,815.32 : 123,945.90 = 49,530.48 : x
2. Step 2: Convert to fraction form
   89,815.32/123,945.90 = 49,530.48/x
3. Step 3: Cross multiply
   89,815.32x = 123,945.90 × 49,530.48
4. Step 4: Simplify right side
   89,815.32x = 6,139,099,921.03
5. Step 5: Solve for x
   x = 6,139,099,921.03/89,815.32
6. Step 6: Final answer
   x = 68,352.48