Finding the Fourth Proportional to 7,780.39, 10,736.89 and 4,243.53

Step by Step Solution

1. Step 1: Write the proportion equation
   7,780.39 : 10,736.89 = 4,243.53 : x
2. Step 2: Convert to fraction form
   7,780.39/10,736.89 = 4,243.53/x
3. Step 3: Cross multiply
   7,780.39x = 10,736.89 × 4,243.53
4. Step 4: Simplify right side
   7,780.39x = 45,562,314.82
5. Step 5: Solve for x
   x = 45,562,314.82/7,780.39
6. Step 6: Final answer
   x = 5,856.05