Finding the Fourth Proportional to 3,917.91, 5,870.37 and 2,820.63

Step by Step Solution

1. Step 1: Write the proportion equation
   3,917.91 : 5,870.37 = 2,820.63 : x
2. Step 2: Convert to fraction form
   3,917.91/5,870.37 = 2,820.63/x
3. Step 3: Cross multiply
   3,917.91x = 5,870.37 × 2,820.63
4. Step 4: Simplify right side
   3,917.91x = 16,558,141.73
5. Step 5: Solve for x
   x = 16,558,141.73/3,917.91
6. Step 6: Final answer
   x = 4,226.27