Finding the Fourth Proportional to 20,788.94, 31,196.37 and 8,307.02

Step by Step Solution

1. Step 1: Write the proportion equation
   20,788.94 : 31,196.37 = 8,307.02 : x
2. Step 2: Convert to fraction form
   20,788.94/31,196.37 = 8,307.02/x
3. Step 3: Cross multiply
   20,788.94x = 31,196.37 × 8,307.02
4. Step 4: Simplify right side
   20,788.94x = 259,148,978.66
5. Step 5: Solve for x
   x = 259,148,978.66/20,788.94
6. Step 6: Final answer
   x = 12,465.71