Finding the Fourth Proportional to 7,774.17, 10,721.88 and 5,645.49

Step by Step Solution

1. Step 1: Write the proportion equation
   7,774.17 : 10,721.88 = 5,645.49 : x
2. Step 2: Convert to fraction form
   7,774.17/10,721.88 = 5,645.49/x
3. Step 3: Cross multiply
   7,774.17x = 10,721.88 × 5,645.49
4. Step 4: Simplify right side
   7,774.17x = 60,530,266.32
5. Step 5: Solve for x
   x = 60,530,266.32/7,774.17
6. Step 6: Final answer
   x = 7,786.07