Finding the Fourth Proportional to 12,280.07, 18,406.34 and 4,882.55

Step by Step Solution

1. Step 1: Write the proportion equation
   12,280.07 : 18,406.34 = 4,882.55 : x
2. Step 2: Convert to fraction form
   12,280.07/18,406.34 = 4,882.55/x
3. Step 3: Cross multiply
   12,280.07x = 18,406.34 × 4,882.55
4. Step 4: Simplify right side
   12,280.07x = 89,869,777.23
5. Step 5: Solve for x
   x = 89,869,777.23/12,280.07
6. Step 6: Final answer
   x = 7,318.34