Finding the Fourth Proportional to 8,897.82, 12,279.90 and 5,121.13

Step by Step Solution

1. Step 1: Write the proportion equation
   8,897.82 : 12,279.90 = 5,121.13 : x
2. Step 2: Convert to fraction form
   8,897.82/12,279.90 = 5,121.13/x
3. Step 3: Cross multiply
   8,897.82x = 12,279.90 × 5,121.13
4. Step 4: Simplify right side
   8,897.82x = 62,886,902.89
5. Step 5: Solve for x
   x = 62,886,902.89/8,897.82
6. Step 6: Final answer
   x = 7,067.68