Finding the Fourth Proportional to 71,919.31, 99,245.04 and 40,082.06

Step by Step Solution

1. Step 1: Write the proportion equation
   71,919.31 : 99,245.04 = 40,082.06 : x
2. Step 2: Convert to fraction form
   71,919.31/99,245.04 = 40,082.06/x
3. Step 3: Cross multiply
   71,919.31x = 99,245.04 × 40,082.06
4. Step 4: Simplify right side
   71,919.31x = 3,977,945,647.98
5. Step 5: Solve for x
   x = 3,977,945,647.98/71,919.31
6. Step 6: Final answer
   x = 55,311.23