Finding the Fourth Proportional to 8,412.31, 12,621.89 and 4,253.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,412.31 : 12,621.89 = 4,253.50 : x
2. Step 2: Convert to fraction form
   8,412.31/12,621.89 = 4,253.50/x
3. Step 3: Cross multiply
   8,412.31x = 12,621.89 × 4,253.50
4. Step 4: Simplify right side
   8,412.31x = 53,687,209.12
5. Step 5: Solve for x
   x = 53,687,209.12/8,412.31
6. Step 6: Final answer
   x = 6,381.98