Finding the Fourth Proportional to 42,072.10, 63,109.77 and 10,906.54

Step by Step Solution

1. Step 1: Write the proportion equation
   42,072.10 : 63,109.77 = 10,906.54 : x
2. Step 2: Convert to fraction form
   42,072.10/63,109.77 = 10,906.54/x
3. Step 3: Cross multiply
   42,072.10x = 63,109.77 × 10,906.54
4. Step 4: Simplify right side
   42,072.10x = 688,309,230.90
5. Step 5: Solve for x
   x = 688,309,230.90/42,072.10
6. Step 6: Final answer
   x = 16,360.23