Finding the Fourth Proportional to 8,300.21, 12,458.13 and 5,528.83

Step by Step Solution

1. Step 1: Write the proportion equation
   8,300.21 : 12,458.13 = 5,528.83 : x
2. Step 2: Convert to fraction form
   8,300.21/12,458.13 = 5,528.83/x
3. Step 3: Cross multiply
   8,300.21x = 12,458.13 × 5,528.83
4. Step 4: Simplify right side
   8,300.21x = 68,878,882.89
5. Step 5: Solve for x
   x = 68,878,882.89/8,300.21
6. Step 6: Final answer
   x = 8,298.45