Finding the Fourth Proportional to 99,727.98, 137,675.40 and 77,015.98

Step by Step Solution

1. Step 1: Write the proportion equation
   99,727.98 : 137,675.40 = 77,015.98 : x
2. Step 2: Convert to fraction form
   99,727.98/137,675.40 = 77,015.98/x
3. Step 3: Cross multiply
   99,727.98x = 137,675.40 × 77,015.98
4. Step 4: Simplify right side
   99,727.98x = 10,603,205,852.89
5. Step 5: Solve for x
   x = 10,603,205,852.89/99,727.98
6. Step 6: Final answer
   x = 106,321.27