Finding the Fourth Proportional to 42,012.67, 63,028.81 and 13,930.67

Step by Step Solution

1. Step 1: Write the proportion equation
   42,012.67 : 63,028.81 = 13,930.67 : x
2. Step 2: Convert to fraction form
   42,012.67/63,028.81 = 13,930.67/x
3. Step 3: Cross multiply
   42,012.67x = 63,028.81 × 13,930.67
4. Step 4: Simplify right side
   42,012.67x = 878,033,552.60
5. Step 5: Solve for x
   x = 878,033,552.60/42,012.67
6. Step 6: Final answer
   x = 20,899.26