Finding the Fourth Proportional to 104,146.17, 143,721.49 and 56,399.37

Step by Step Solution

1. Step 1: Write the proportion equation
   104,146.17 : 143,721.49 = 56,399.37 : x
2. Step 2: Convert to fraction form
   104,146.17/143,721.49 = 56,399.37/x
3. Step 3: Cross multiply
   104,146.17x = 143,721.49 × 56,399.37
4. Step 4: Simplify right side
   104,146.17x = 8,105,801,491.46
5. Step 5: Solve for x
   x = 8,105,801,491.46/104,146.17
6. Step 6: Final answer
   x = 77,831.01