Finding the Fourth Proportional to 42,086.86, 63,137.88 and 12,099.65

Step by Step Solution

1. Step 1: Write the proportion equation
   42,086.86 : 63,137.88 = 12,099.65 : x
2. Step 2: Convert to fraction form
   42,086.86/63,137.88 = 12,099.65/x
3. Step 3: Cross multiply
   42,086.86x = 63,137.88 × 12,099.65
4. Step 4: Simplify right side
   42,086.86x = 763,945,934.05
5. Step 5: Solve for x
   x = 763,945,934.05/42,086.86
6. Step 6: Final answer
   x = 18,151.65