Finding the Fourth Proportional to 7,240.68, 9,991.98 and 4,256.82

Step by Step Solution

1. Step 1: Write the proportion equation
   7,240.68 : 9,991.98 = 4,256.82 : x
2. Step 2: Convert to fraction form
   7,240.68/9,991.98 = 4,256.82/x
3. Step 3: Cross multiply
   7,240.68x = 9,991.98 × 4,256.82
4. Step 4: Simplify right side
   7,240.68x = 42,534,060.30
5. Step 5: Solve for x
   x = 42,534,060.30/7,240.68
6. Step 6: Final answer
   x = 5,874.32