Finding the Fourth Proportional to 14,566.21, 21,799.12 and 8,940.15

Step by Step Solution

1. Step 1: Write the proportion equation
   14,566.21 : 21,799.12 = 8,940.15 : x
2. Step 2: Convert to fraction form
   14,566.21/21,799.12 = 8,940.15/x
3. Step 3: Cross multiply
   14,566.21x = 21,799.12 × 8,940.15
4. Step 4: Simplify right side
   14,566.21x = 194,887,402.67
5. Step 5: Solve for x
   x = 194,887,402.67/14,566.21
6. Step 6: Final answer
   x = 13,379.42