Finding the Fourth Proportional to 7,780.16, 10,736.88 and 4,243.57

Step by Step Solution

1. Step 1: Write the proportion equation
   7,780.16 : 10,736.88 = 4,243.57 : x
2. Step 2: Convert to fraction form
   7,780.16/10,736.88 = 4,243.57/x
3. Step 3: Cross multiply
   7,780.16x = 10,736.88 × 4,243.57
4. Step 4: Simplify right side
   7,780.16x = 45,562,701.86
5. Step 5: Solve for x
   x = 45,562,701.86/7,780.16
6. Step 6: Final answer
   x = 5,856.27