Finding the Fourth Proportional to 71,870.78, 99,181.82 and 40,040.82

Step by Step Solution

1. Step 1: Write the proportion equation
   71,870.78 : 99,181.82 = 40,040.82 : x
2. Step 2: Convert to fraction form
   71,870.78/99,181.82 = 40,040.82/x
3. Step 3: Cross multiply
   71,870.78x = 99,181.82 × 40,040.82
4. Step 4: Simplify right side
   71,870.78x = 3,971,321,401.89
5. Step 5: Solve for x
   x = 3,971,321,401.89/71,870.78
6. Step 6: Final answer
   x = 55,256.41