Finding the Fourth Proportional to 42,072.85, 63,108.77 and 12,087.83

Step by Step Solution

1. Step 1: Write the proportion equation
   42,072.85 : 63,108.77 = 12,087.83 : x
2. Step 2: Convert to fraction form
   42,072.85/63,108.77 = 12,087.83/x
3. Step 3: Cross multiply
   42,072.85x = 63,108.77 × 12,087.83
4. Step 4: Simplify right side
   42,072.85x = 762,847,938.94
5. Step 5: Solve for x
   x = 762,847,938.94/42,072.85
6. Step 6: Final answer
   x = 18,131.60