Finding the Fourth Proportional to 12,152.72, 18,228.47 and 4,758.53

Step by Step Solution

1. Step 1: Write the proportion equation
   12,152.72 : 18,228.47 = 4,758.53 : x
2. Step 2: Convert to fraction form
   12,152.72/18,228.47 = 4,758.53/x
3. Step 3: Cross multiply
   12,152.72x = 18,228.47 × 4,758.53
4. Step 4: Simplify right side
   12,152.72x = 86,740,722.33
5. Step 5: Solve for x
   x = 86,740,722.33/12,152.72
6. Step 6: Final answer
   x = 7,137.56