Finding the Fourth Proportional to 6,280.10, 8,666.69 and 3,554.40

Step by Step Solution

1. Step 1: Write the proportion equation
   6,280.10 : 8,666.69 = 3,554.40 : x
2. Step 2: Convert to fraction form
   6,280.10/8,666.69 = 3,554.40/x
3. Step 3: Cross multiply
   6,280.10x = 8,666.69 × 3,554.40
4. Step 4: Simplify right side
   6,280.10x = 30,804,865.16
5. Step 5: Solve for x
   x = 30,804,865.16/6,280.10
6. Step 6: Final answer
   x = 4,905.16