Finding the Fourth Proportional to 6,436.10, 8,881.91 and 3,918.32

Step by Step Solution

1. Step 1: Write the proportion equation
   6,436.10 : 8,881.91 = 3,918.32 : x
2. Step 2: Convert to fraction form
   6,436.10/8,881.91 = 3,918.32/x
3. Step 3: Cross multiply
   6,436.10x = 8,881.91 × 3,918.32
4. Step 4: Simplify right side
   6,436.10x = 34,802,165.59
5. Step 5: Solve for x
   x = 34,802,165.59/6,436.10
6. Step 6: Final answer
   x = 5,407.34