Finding the Fourth Proportional to 5,820.76, 8,685.59 and 5,120.92

Step by Step Solution

1. Step 1: Write the proportion equation
   5,820.76 : 8,685.59 = 5,120.92 : x
2. Step 2: Convert to fraction form
   5,820.76/8,685.59 = 5,120.92/x
3. Step 3: Cross multiply
   5,820.76x = 8,685.59 × 5,120.92
4. Step 4: Simplify right side
   5,820.76x = 44,478,211.54
5. Step 5: Solve for x
   x = 44,478,211.54/5,820.76
6. Step 6: Final answer
   x = 7,641.31