Finding the Fourth Proportional to 20,886.42, 31,338.81 and 7,735.98

Step by Step Solution

1. Step 1: Write the proportion equation
   20,886.42 : 31,338.81 = 7,735.98 : x
2. Step 2: Convert to fraction form
   20,886.42/31,338.81 = 7,735.98/x
3. Step 3: Cross multiply
   20,886.42x = 31,338.81 × 7,735.98
4. Step 4: Simplify right side
   20,886.42x = 242,436,407.38
5. Step 5: Solve for x
   x = 242,436,407.38/20,886.42
6. Step 6: Final answer
   x = 11,607.37