Finding the Fourth Proportional to 100,796.94, 139,105.50 and 57,783.54

Step by Step Solution

1. Step 1: Write the proportion equation
   100,796.94 : 139,105.50 = 57,783.54 : x
2. Step 2: Convert to fraction form
   100,796.94/139,105.50 = 57,783.54/x
3. Step 3: Cross multiply
   100,796.94x = 139,105.50 × 57,783.54
4. Step 4: Simplify right side
   100,796.94x = 8,038,008,223.47
5. Step 5: Solve for x
   x = 8,038,008,223.47/100,796.94
6. Step 6: Final answer
   x = 79,744.57