Finding the Fourth Proportional to 77,681.98, 107,218.83 and 54,997.39

Step by Step Solution

1. Step 1: Write the proportion equation
   77,681.98 : 107,218.83 = 54,997.39 : x
2. Step 2: Convert to fraction form
   77,681.98/107,218.83 = 54,997.39/x
3. Step 3: Cross multiply
   77,681.98x = 107,218.83 × 54,997.39
4. Step 4: Simplify right side
   77,681.98x = 5,896,755,808.85
5. Step 5: Solve for x
   x = 5,896,755,808.85/77,681.98
6. Step 6: Final answer
   x = 75,908.93