Finding the Fourth Proportional to 73,972.98, 102,082.72 and 39,981.38

Step by Step Solution

1. Step 1: Write the proportion equation
   73,972.98 : 102,082.72 = 39,981.38 : x
2. Step 2: Convert to fraction form
   73,972.98/102,082.72 = 39,981.38/x
3. Step 3: Cross multiply
   73,972.98x = 102,082.72 × 39,981.38
4. Step 4: Simplify right side
   73,972.98x = 4,081,408,019.75
5. Step 5: Solve for x
   x = 4,081,408,019.75/73,972.98
6. Step 6: Final answer
   x = 55,174.31