Finding the Fourth Proportional to 81,638.82, 122,364.57 and 34,245.15

Step by Step Solution

1. Step 1: Write the proportion equation
   81,638.82 : 122,364.57 = 34,245.15 : x
2. Step 2: Convert to fraction form
   81,638.82/122,364.57 = 34,245.15/x
3. Step 3: Cross multiply
   81,638.82x = 122,364.57 × 34,245.15
4. Step 4: Simplify right side
   81,638.82x = 4,190,392,723.89
5. Step 5: Solve for x
   x = 4,190,392,723.89/81,638.82
6. Step 6: Final answer
   x = 51,328.43