Finding the Fourth Proportional to 137,142.24, 189,262.54 and 83,418.18

Step by Step Solution

1. Step 1: Write the proportion equation
   137,142.24 : 189,262.54 = 83,418.18 : x
2. Step 2: Convert to fraction form
   137,142.24/189,262.54 = 83,418.18/x
3. Step 3: Cross multiply
   137,142.24x = 189,262.54 × 83,418.18
4. Step 4: Simplify right side
   137,142.24x = 15,787,936,628.98
5. Step 5: Solve for x
   x = 15,787,936,628.98/137,142.24
6. Step 6: Final answer
   x = 115,120.89