Finding the Fourth Proportional to 9,410.74, 12,986.89 and 6,426.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,410.74 : 12,986.89 = 6,426.50 : x
2. Step 2: Convert to fraction form
   9,410.74/12,986.89 = 6,426.50/x
3. Step 3: Cross multiply
   9,410.74x = 12,986.89 × 6,426.50
4. Step 4: Simplify right side
   9,410.74x = 83,460,167.58
5. Step 5: Solve for x
   x = 83,460,167.58/9,410.74
6. Step 6: Final answer
   x = 8,868.61