Finding the Fourth Proportional to 8,200.64, 12,300.86 and 2,357.30

Step by Step Solution

1. Step 1: Write the proportion equation
   8,200.64 : 12,300.86 = 2,357.30 : x
2. Step 2: Convert to fraction form
   8,200.64/12,300.86 = 2,357.30/x
3. Step 3: Cross multiply
   8,200.64x = 12,300.86 × 2,357.30
4. Step 4: Simplify right side
   8,200.64x = 28,996,853.92
5. Step 5: Solve for x
   x = 28,996,853.92/8,200.64
6. Step 6: Final answer
   x = 3,535.92