Finding the Fourth Proportional to 7,864.72, 10,856.71 and 5,622.70

Step by Step Solution

1. Step 1: Write the proportion equation
   7,864.72 : 10,856.71 = 5,622.70 : x
2. Step 2: Convert to fraction form
   7,864.72/10,856.71 = 5,622.70/x
3. Step 3: Cross multiply
   7,864.72x = 10,856.71 × 5,622.70
4. Step 4: Simplify right side
   7,864.72x = 61,044,023.32
5. Step 5: Solve for x
   x = 61,044,023.32/7,864.72
6. Step 6: Final answer
   x = 7,761.75