Finding the Fourth Proportional to 68,817.89, 103,245.32 and 54,830.71

Step by Step Solution

1. Step 1: Write the proportion equation
   68,817.89 : 103,245.32 = 54,830.71 : x
2. Step 2: Convert to fraction form
   68,817.89/103,245.32 = 54,830.71/x
3. Step 3: Cross multiply
   68,817.89x = 103,245.32 × 54,830.71
4. Step 4: Simplify right side
   68,817.89x = 5,661,014,199.78
5. Step 5: Solve for x
   x = 5,661,014,199.78/68,817.89
6. Step 6: Final answer
   x = 82,260.79