Finding the Fourth Proportional to 76,771.98, 105,896.85 and 52,857.12

Step by Step Solution

1. Step 1: Write the proportion equation
   76,771.98 : 105,896.85 = 52,857.12 : x
2. Step 2: Convert to fraction form
   76,771.98/105,896.85 = 52,857.12/x
3. Step 3: Cross multiply
   76,771.98x = 105,896.85 × 52,857.12
4. Step 4: Simplify right side
   76,771.98x = 5,597,402,508.07
5. Step 5: Solve for x
   x = 5,597,402,508.07/76,771.98
6. Step 6: Final answer
   x = 72,909.45