Finding the Fourth Proportional to 7,781.98, 10,739.22 and 4,245.25

Step by Step Solution

1. Step 1: Write the proportion equation
   7,781.98 : 10,739.22 = 4,245.25 : x
2. Step 2: Convert to fraction form
   7,781.98/10,739.22 = 4,245.25/x
3. Step 3: Cross multiply
   7,781.98x = 10,739.22 × 4,245.25
4. Step 4: Simplify right side
   7,781.98x = 45,590,598.78
5. Step 5: Solve for x
   x = 45,590,598.78/7,781.98
6. Step 6: Final answer
   x = 5,858.49