Finding the Fourth Proportional to 20,738.32, 31,095.93 and 12,308.25

Step by Step Solution

1. Step 1: Write the proportion equation
   20,738.32 : 31,095.93 = 12,308.25 : x
2. Step 2: Convert to fraction form
   20,738.32/31,095.93 = 12,308.25/x
3. Step 3: Cross multiply
   20,738.32x = 31,095.93 × 12,308.25
4. Step 4: Simplify right side
   20,738.32x = 382,736,480.42
5. Step 5: Solve for x
   x = 382,736,480.42/20,738.32
6. Step 6: Final answer
   x = 18,455.52