Finding the Fourth Proportional to 12,465.10, 18,705.42 and 8,308.02

Step by Step Solution

1. Step 1: Write the proportion equation
   12,465.10 : 18,705.42 = 8,308.02 : x
2. Step 2: Convert to fraction form
   12,465.10/18,705.42 = 8,308.02/x
3. Step 3: Cross multiply
   12,465.10x = 18,705.42 × 8,308.02
4. Step 4: Simplify right side
   12,465.10x = 155,405,003.47
5. Step 5: Solve for x
   x = 155,405,003.47/12,465.10
6. Step 6: Final answer
   x = 12,467.21