Finding the Fourth Proportional to 89,279.48, 123,207.54 and 48,990.89

Step by Step Solution

1. Step 1: Write the proportion equation
   89,279.48 : 123,207.54 = 48,990.89 : x
2. Step 2: Convert to fraction form
   89,279.48/123,207.54 = 48,990.89/x
3. Step 3: Cross multiply
   89,279.48x = 123,207.54 × 48,990.89
4. Step 4: Simplify right side
   89,279.48x = 6,036,047,039.31
5. Step 5: Solve for x
   x = 6,036,047,039.31/89,279.48
6. Step 6: Final answer
   x = 67,608.45