Finding the Fourth Proportional to 258,716.46, 388,133.00 and 78,817.98

Step by Step Solution

1. Step 1: Write the proportion equation
   258,716.46 : 388,133.00 = 78,817.98 : x
2. Step 2: Convert to fraction form
   258,716.46/388,133.00 = 78,817.98/x
3. Step 3: Cross multiply
   258,716.46x = 388,133.00 × 78,817.98
4. Step 4: Simplify right side
   258,716.46x = 30,591,858,637.25
5. Step 5: Solve for x
   x = 30,591,858,637.25/258,716.46
6. Step 6: Final answer
   x = 118,244.73