Finding the Fourth Proportional to 76,773.98, 105,899.61 and 52,859.12

Step by Step Solution

1. Step 1: Write the proportion equation
   76,773.98 : 105,899.61 = 52,859.12 : x
2. Step 2: Convert to fraction form
   76,773.98/105,899.61 = 52,859.12/x
3. Step 3: Cross multiply
   76,773.98x = 105,899.61 × 52,859.12
4. Step 4: Simplify right side
   76,773.98x = 5,597,760,192.94
5. Step 5: Solve for x
   x = 5,597,760,192.94/76,773.98
6. Step 6: Final answer
   x = 72,912.21