Finding the Fourth Proportional to 42,446.50, 63,669.71 and 10,856.62

Step by Step Solution

1. Step 1: Write the proportion equation
   42,446.50 : 63,669.71 = 10,856.62 : x
2. Step 2: Convert to fraction form
   42,446.50/63,669.71 = 10,856.62/x
3. Step 3: Cross multiply
   42,446.50x = 63,669.71 × 10,856.62
4. Step 4: Simplify right side
   42,446.50x = 691,237,595.57
5. Step 5: Solve for x
   x = 691,237,595.57/42,446.50
6. Step 6: Final answer
   x = 16,284.91