Finding the Fourth Proportional to 101,105.79, 139,525.07 and 55,784.18

Step by Step Solution

1. Step 1: Write the proportion equation
   101,105.79 : 139,525.07 = 55,784.18 : x
2. Step 2: Convert to fraction form
   101,105.79/139,525.07 = 55,784.18/x
3. Step 3: Cross multiply
   101,105.79x = 139,525.07 × 55,784.18
4. Step 4: Simplify right side
   101,105.79x = 7,783,290,642.85
5. Step 5: Solve for x
   x = 7,783,290,642.85/101,105.79
6. Step 6: Final answer
   x = 76,981.65