Finding the Fourth Proportional to 10,115.56, 15,153.32 and 4,771.42

Step by Step Solution

1. Step 1: Write the proportion equation
   10,115.56 : 15,153.32 = 4,771.42 : x
2. Step 2: Convert to fraction form
   10,115.56/15,153.32 = 4,771.42/x
3. Step 3: Cross multiply
   10,115.56x = 15,153.32 × 4,771.42
4. Step 4: Simplify right side
   10,115.56x = 72,302,830.26
5. Step 5: Solve for x
   x = 72,302,830.26/10,115.56
6. Step 6: Final answer
   x = 7,147.68