Finding the Fourth Proportional to 6,431.31, 8,875.08 and 3,636.81

Step by Step Solution

1. Step 1: Write the proportion equation
   6,431.31 : 8,875.08 = 3,636.81 : x
2. Step 2: Convert to fraction form
   6,431.31/8,875.08 = 3,636.81/x
3. Step 3: Cross multiply
   6,431.31x = 8,875.08 × 3,636.81
4. Step 4: Simplify right side
   6,431.31x = 32,276,979.69
5. Step 5: Solve for x
   x = 32,276,979.69/6,431.31
6. Step 6: Final answer
   x = 5,018.73