Finding the Fourth Proportional to 15,449.69, 21,320.56 and 8,376.05

Step by Step Solution

1. Step 1: Write the proportion equation
   15,449.69 : 21,320.56 = 8,376.05 : x
2. Step 2: Convert to fraction form
   15,449.69/21,320.56 = 8,376.05/x
3. Step 3: Cross multiply
   15,449.69x = 21,320.56 × 8,376.05
4. Step 4: Simplify right side
   15,449.69x = 178,582,076.59
5. Step 5: Solve for x
   x = 178,582,076.59/15,449.69
6. Step 6: Final answer
   x = 11,558.94