Finding the Fourth Proportional to 101,105.99, 139,525.86 and 55,786.79

Step by Step Solution

1. Step 1: Write the proportion equation
   101,105.99 : 139,525.86 = 55,786.79 : x
2. Step 2: Convert to fraction form
   101,105.99/139,525.86 = 55,786.79/x
3. Step 3: Cross multiply
   101,105.99x = 139,525.86 × 55,786.79
4. Step 4: Simplify right side
   101,105.99x = 7,783,698,874.83
5. Step 5: Solve for x
   x = 7,783,698,874.83/101,105.99
6. Step 6: Final answer
   x = 76,985.54