Finding the Fourth Proportional to 5,191.89, 7,162.62 and 3,620.90

Step by Step Solution

1. Step 1: Write the proportion equation
   5,191.89 : 7,162.62 = 3,620.90 : x
2. Step 2: Convert to fraction form
   5,191.89/7,162.62 = 3,620.90/x
3. Step 3: Cross multiply
   5,191.89x = 7,162.62 × 3,620.90
4. Step 4: Simplify right side
   5,191.89x = 25,935,094.94
5. Step 5: Solve for x
   x = 25,935,094.94/5,191.89
6. Step 6: Final answer
   x = 4,995.31