Finding the Fourth Proportional to 7,642.35, 10,545.57 and 4,284.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,642.35 : 10,545.57 = 4,284.72 : x
2. Step 2: Convert to fraction form
   7,642.35/10,545.57 = 4,284.72/x
3. Step 3: Cross multiply
   7,642.35x = 10,545.57 × 4,284.72
4. Step 4: Simplify right side
   7,642.35x = 45,184,814.69
5. Step 5: Solve for x
   x = 45,184,814.69/7,642.35
6. Step 6: Final answer
   x = 5,912.42