Finding the Fourth Proportional to 5,621.72, 7,701.65 and 5,411.39

Step by Step Solution

1. Step 1: Write the proportion equation
   5,621.72 : 7,701.65 = 5,411.39 : x
2. Step 2: Convert to fraction form
   5,621.72/7,701.65 = 5,411.39/x
3. Step 3: Cross multiply
   5,621.72x = 7,701.65 × 5,411.39
4. Step 4: Simplify right side
   5,621.72x = 41,676,566.23
5. Step 5: Solve for x
   x = 41,676,566.23/5,621.72
6. Step 6: Final answer
   x = 7,413.50