Finding the Fourth Proportional to 7,141.98, 9,860.31 and 5,655.90

Step by Step Solution

1. Step 1: Write the proportion equation
   7,141.98 : 9,860.31 = 5,655.90 : x
2. Step 2: Convert to fraction form
   7,141.98/9,860.31 = 5,655.90/x
3. Step 3: Cross multiply
   7,141.98x = 9,860.31 × 5,655.90
4. Step 4: Simplify right side
   7,141.98x = 55,768,927.33
5. Step 5: Solve for x
   x = 55,768,927.33/7,141.98
6. Step 6: Final answer
   x = 7,808.61