Finding the Fourth Proportional to 6,405.82, 8,838.53 and 3,887.87

Step by Step Solution

1. Step 1: Write the proportion equation
   6,405.82 : 8,838.53 = 3,887.87 : x
2. Step 2: Convert to fraction form
   6,405.82/8,838.53 = 3,887.87/x
3. Step 3: Cross multiply
   6,405.82x = 8,838.53 × 3,887.87
4. Step 4: Simplify right side
   6,405.82x = 34,363,055.63
5. Step 5: Solve for x
   x = 34,363,055.63/6,405.82
6. Step 6: Final answer
   x = 5,364.35