Finding the Fourth Proportional to 55,665, 76,817.88 and 30,171.78

Step by Step Solution

1. Step 1: Write the proportion equation
   55,665 : 76,817.88 = 30,171.78 : x
2. Step 2: Convert to fraction form
   55,665/76,817.88 = 30,171.78/x
3. Step 3: Cross multiply
   55,665x = 76,817.88 × 30,171.78
4. Step 4: Simplify right side
   55,665x = 2,317,732,175.43
5. Step 5: Solve for x
   x = 2,317,732,175.43/55,665
6. Step 6: Final answer
   x = 41,637.15