Finding the Fourth Proportional to 13,086.72, 19,630.62 and 4,321.62

Step by Step Solution

1. Step 1: Write the proportion equation
   13,086.72 : 19,630.62 = 4,321.62 : x
2. Step 2: Convert to fraction form
   13,086.72/19,630.62 = 4,321.62/x
3. Step 3: Cross multiply
   13,086.72x = 19,630.62 × 4,321.62
4. Step 4: Simplify right side
   13,086.72x = 84,836,080.00
5. Step 5: Solve for x
   x = 84,836,080.00/13,086.72
6. Step 6: Final answer
   x = 6,482.61