Finding the Fourth Proportional to 12,087.47, 18,128.12 and 3,765.93

Step by Step Solution

1. Step 1: Write the proportion equation
   12,087.47 : 18,128.12 = 3,765.93 : x
2. Step 2: Convert to fraction form
   12,087.47/18,128.12 = 3,765.93/x
3. Step 3: Cross multiply
   12,087.47x = 18,128.12 × 3,765.93
4. Step 4: Simplify right side
   12,087.47x = 68,269,263.03
5. Step 5: Solve for x
   x = 68,269,263.03/12,087.47
6. Step 6: Final answer
   x = 5,647.94