Finding the Fourth Proportional to 14,287.89, 19,718.55 and 8,320.14

Step by Step Solution

1. Step 1: Write the proportion equation
   14,287.89 : 19,718.55 = 8,320.14 : x
2. Step 2: Convert to fraction form
   14,287.89/19,718.55 = 8,320.14/x
3. Step 3: Cross multiply
   14,287.89x = 19,718.55 × 8,320.14
4. Step 4: Simplify right side
   14,287.89x = 164,061,096.60
5. Step 5: Solve for x
   x = 164,061,096.60/14,287.89
6. Step 6: Final answer
   x = 11,482.53