Finding the Fourth Proportional to 5,891.86, 8,826.51 and 5,641.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,891.86 : 8,826.51 = 5,641.72 : x
2. Step 2: Convert to fraction form
   5,891.86/8,826.51 = 5,641.72/x
3. Step 3: Cross multiply
   5,891.86x = 8,826.51 × 5,641.72
4. Step 4: Simplify right side
   5,891.86x = 49,796,698.00
5. Step 5: Solve for x
   x = 49,796,698.00/5,891.86
6. Step 6: Final answer
   x = 8,451.78