Finding the Fourth Proportional to 7,641.56, 10,545.88 and 4,285

Step by Step Solution

1. Step 1: Write the proportion equation
   7,641.56 : 10,545.88 = 4,285 : x
2. Step 2: Convert to fraction form
   7,641.56/10,545.88 = 4,285/x
3. Step 3: Cross multiply
   7,641.56x = 10,545.88 × 4,285
4. Step 4: Simplify right side
   7,641.56x = 45,189,095.80
5. Step 5: Solve for x
   x = 45,189,095.80/7,641.56
6. Step 6: Final answer
   x = 5,913.60