Finding the Fourth Proportional to 6,656.40, 9,990.78 and 3,371.82

Step by Step Solution

1. Step 1: Write the proportion equation
   6,656.40 : 9,990.78 = 3,371.82 : x
2. Step 2: Convert to fraction form
   6,656.40/9,990.78 = 3,371.82/x
3. Step 3: Cross multiply
   6,656.40x = 9,990.78 × 3,371.82
4. Step 4: Simplify right side
   6,656.40x = 33,687,111.82
5. Step 5: Solve for x
   x = 33,687,111.82/6,656.40
6. Step 6: Final answer
   x = 5,060.86