Finding the Fourth Proportional to 14,577.91, 21,861.49 and 5,215.39

Step by Step Solution

1. Step 1: Write the proportion equation
   14,577.91 : 21,861.49 = 5,215.39 : x
2. Step 2: Convert to fraction form
   14,577.91/21,861.49 = 5,215.39/x
3. Step 3: Cross multiply
   14,577.91x = 21,861.49 × 5,215.39
4. Step 4: Simplify right side
   14,577.91x = 114,016,196.33
5. Step 5: Solve for x
   x = 114,016,196.33/14,577.91
6. Step 6: Final answer
   x = 7,821.16