Finding the Fourth Proportional to 12,172.59, 18,261.63 and 3,853.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,172.59 : 18,261.63 = 3,853.10 : x
2. Step 2: Convert to fraction form
   12,172.59/18,261.63 = 3,853.10/x
3. Step 3: Cross multiply
   12,172.59x = 18,261.63 × 3,853.10
4. Step 4: Simplify right side
   12,172.59x = 70,363,932.21
5. Step 5: Solve for x
   x = 70,363,932.21/12,172.59
6. Step 6: Final answer
   x = 5,780.52