Finding the Fourth Proportional to 5,478.06, 8,222.46 and 3,698.88

Step by Step Solution

1. Step 1: Write the proportion equation
   5,478.06 : 8,222.46 = 3,698.88 : x
2. Step 2: Convert to fraction form
   5,478.06/8,222.46 = 3,698.88/x
3. Step 3: Cross multiply
   5,478.06x = 8,222.46 × 3,698.88
4. Step 4: Simplify right side
   5,478.06x = 30,413,892.84
5. Step 5: Solve for x
   x = 30,413,892.84/5,478.06
6. Step 6: Final answer
   x = 5,551.95