Finding the Fourth Proportional to 6,386.34, 8,813.30 and 3,553.91

Step by Step Solution

1. Step 1: Write the proportion equation
   6,386.34 : 8,813.30 = 3,553.91 : x
2. Step 2: Convert to fraction form
   6,386.34/8,813.30 = 3,553.91/x
3. Step 3: Cross multiply
   6,386.34x = 8,813.30 × 3,553.91
4. Step 4: Simplify right side
   6,386.34x = 31,321,613.17
5. Step 5: Solve for x
   x = 31,321,613.17/6,386.34
6. Step 6: Final answer
   x = 4,904.47