Finding the Fourth Proportional to 8,890.63, 13,320.15 and 4,205.59

Step by Step Solution

1. Step 1: Write the proportion equation
   8,890.63 : 13,320.15 = 4,205.59 : x
2. Step 2: Convert to fraction form
   8,890.63/13,320.15 = 4,205.59/x
3. Step 3: Cross multiply
   8,890.63x = 13,320.15 × 4,205.59
4. Step 4: Simplify right side
   8,890.63x = 56,019,089.64
5. Step 5: Solve for x
   x = 56,019,089.64/8,890.63
6. Step 6: Final answer
   x = 6,300.91