Finding the Fourth Proportional to 20,807.22, 31,196.24 and 7,657.88

Step by Step Solution

1. Step 1: Write the proportion equation
   20,807.22 : 31,196.24 = 7,657.88 : x
2. Step 2: Convert to fraction form
   20,807.22/31,196.24 = 7,657.88/x
3. Step 3: Cross multiply
   20,807.22x = 31,196.24 × 7,657.88
4. Step 4: Simplify right side
   20,807.22x = 238,897,062.37
5. Step 5: Solve for x
   x = 238,897,062.37/20,807.22
6. Step 6: Final answer
   x = 11,481.45