Finding the Fourth Proportional to 10,072.60, 15,114.78 and 4,228.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,072.60 : 15,114.78 = 4,228.72 : x
2. Step 2: Convert to fraction form
   10,072.60/15,114.78 = 4,228.72/x
3. Step 3: Cross multiply
   10,072.60x = 15,114.78 × 4,228.72
4. Step 4: Simplify right side
   10,072.60x = 63,916,172.48
5. Step 5: Solve for x
   x = 63,916,172.48/10,072.60
6. Step 6: Final answer
   x = 6,345.55