Finding the Fourth Proportional to 15,475.62, 21,356.55 and 8,402.16

Step by Step Solution

1. Step 1: Write the proportion equation
   15,475.62 : 21,356.55 = 8,402.16 : x
2. Step 2: Convert to fraction form
   15,475.62/21,356.55 = 8,402.16/x
3. Step 3: Cross multiply
   15,475.62x = 21,356.55 × 8,402.16
4. Step 4: Simplify right side
   15,475.62x = 179,441,150.15
5. Step 5: Solve for x
   x = 179,441,150.15/15,475.62
6. Step 6: Final answer
   x = 11,595.09