Finding the Fourth Proportional to 21,117.98, 31,671.98 and 7,078.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,117.98 : 31,671.98 = 7,078.52 : x
2. Step 2: Convert to fraction form
   21,117.98/31,671.98 = 7,078.52/x
3. Step 3: Cross multiply
   21,117.98x = 31,671.98 × 7,078.52
4. Step 4: Simplify right side
   21,117.98x = 224,190,743.87
5. Step 5: Solve for x
   x = 224,190,743.87/21,117.98
6. Step 6: Final answer
   x = 10,616.11