Finding the Fourth Proportional to 15,480.05, 21,362.55 and 8,406.47

Step by Step Solution

1. Step 1: Write the proportion equation
   15,480.05 : 21,362.55 = 8,406.47 : x
2. Step 2: Convert to fraction form
   15,480.05/21,362.55 = 8,406.47/x
3. Step 3: Cross multiply
   15,480.05x = 21,362.55 × 8,406.47
4. Step 4: Simplify right side
   15,480.05x = 179,583,528.89
5. Step 5: Solve for x
   x = 179,583,528.89/15,480.05
6. Step 6: Final answer
   x = 11,600.97