Finding the Fourth Proportional to 21,947.62, 30,292.47 and 13,876.15

Step by Step Solution

1. Step 1: Write the proportion equation
   21,947.62 : 30,292.47 = 13,876.15 : x
2. Step 2: Convert to fraction form
   21,947.62/30,292.47 = 13,876.15/x
3. Step 3: Cross multiply
   21,947.62x = 30,292.47 × 13,876.15
4. Step 4: Simplify right side
   21,947.62x = 420,342,857.59
5. Step 5: Solve for x
   x = 420,342,857.59/21,947.62
6. Step 6: Final answer
   x = 19,152.09