Finding the Fourth Proportional to 12,173.48, 18,275.34 and 12,117.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,173.48 : 18,275.34 = 12,117.32 : x
2. Step 2: Convert to fraction form
   12,173.48/18,275.34 = 12,117.32/x
3. Step 3: Cross multiply
   12,173.48x = 18,275.34 × 12,117.32
4. Step 4: Simplify right side
   12,173.48x = 221,448,142.89
5. Step 5: Solve for x
   x = 221,448,142.89/12,173.48
6. Step 6: Final answer
   x = 18,191.03