Finding the Fourth Proportional to 21,483.65, 29,641.37 and 13,930.29

Step by Step Solution

1. Step 1: Write the proportion equation
   21,483.65 : 29,641.37 = 13,930.29 : x
2. Step 2: Convert to fraction form
   21,483.65/29,641.37 = 13,930.29/x
3. Step 3: Cross multiply
   21,483.65x = 29,641.37 × 13,930.29
4. Step 4: Simplify right side
   21,483.65x = 412,912,810.45
5. Step 5: Solve for x
   x = 412,912,810.45/21,483.65
6. Step 6: Final answer
   x = 19,219.87