Finding the Fourth Proportional to 8,587.01, 12,764.72 and 8,334.77

Step by Step Solution

1. Step 1: Write the proportion equation
   8,587.01 : 12,764.72 = 8,334.77 : x
2. Step 2: Convert to fraction form
   8,587.01/12,764.72 = 8,334.77/x
3. Step 3: Cross multiply
   8,587.01x = 12,764.72 × 8,334.77
4. Step 4: Simplify right side
   8,587.01x = 106,390,899.82
5. Step 5: Solve for x
   x = 106,390,899.82/8,587.01
6. Step 6: Final answer
   x = 12,389.76