Finding the Fourth Proportional to 143,563.72, 215,108.60 and 83,423.36

Step by Step Solution

1. Step 1: Write the proportion equation
   143,563.72 : 215,108.60 = 83,423.36 : x
2. Step 2: Convert to fraction form
   143,563.72/215,108.60 = 83,423.36/x
3. Step 3: Cross multiply
   143,563.72x = 215,108.60 × 83,423.36
4. Step 4: Simplify right side
   143,563.72x = 17,945,082,176.90
5. Step 5: Solve for x
   x = 17,945,082,176.90/143,563.72
6. Step 6: Final answer
   x = 124,997.33