Finding the Fourth Proportional to 104,147.37, 143,722.61 and 56,399.61

Step by Step Solution

1. Step 1: Write the proportion equation
   104,147.37 : 143,722.61 = 56,399.61 : x
2. Step 2: Convert to fraction form
   104,147.37/143,722.61 = 56,399.61/x
3. Step 3: Cross multiply
   104,147.37x = 143,722.61 × 56,399.61
4. Step 4: Simplify right side
   104,147.37x = 8,105,898,574.57
5. Step 5: Solve for x
   x = 8,105,898,574.57/104,147.37
6. Step 6: Final answer
   x = 77,831.05