Finding the Fourth Proportional to 12,778.74, 17,636.52 and 7,674.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,778.74 : 17,636.52 = 7,674.59 : x
2. Step 2: Convert to fraction form
   12,778.74/17,636.52 = 7,674.59/x
3. Step 3: Cross multiply
   12,778.74x = 17,636.52 × 7,674.59
4. Step 4: Simplify right side
   12,778.74x = 135,353,060.03
5. Step 5: Solve for x
   x = 135,353,060.03/12,778.74
6. Step 6: Final answer
   x = 10,592.05