Finding the Fourth Proportional to 89,123.50, 122,990.43 and 49,379.50

Step by Step Solution

1. Step 1: Write the proportion equation
   89,123.50 : 122,990.43 = 49,379.50 : x
2. Step 2: Convert to fraction form
   89,123.50/122,990.43 = 49,379.50/x
3. Step 3: Cross multiply
   89,123.50x = 122,990.43 × 49,379.50
4. Step 4: Simplify right side
   89,123.50x = 6,073,205,938.19
5. Step 5: Solve for x
   x = 6,073,205,938.19/89,123.50
6. Step 6: Final answer
   x = 68,143.71