Finding the Fourth Proportional to 5,188.89, 7,160.61 and 2,830.98

Step by Step Solution

1. Step 1: Write the proportion equation
   5,188.89 : 7,160.61 = 2,830.98 : x
2. Step 2: Convert to fraction form
   5,188.89/7,160.61 = 2,830.98/x
3. Step 3: Cross multiply
   5,188.89x = 7,160.61 × 2,830.98
4. Step 4: Simplify right side
   5,188.89x = 20,271,543.70
5. Step 5: Solve for x
   x = 20,271,543.70/5,188.89
6. Step 6: Final answer
   x = 3,906.72