Finding the Fourth Proportional to 12,706.74, 17,536.23 and 7,401.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,706.74 : 17,536.23 = 7,401.78 : x
2. Step 2: Convert to fraction form
   12,706.74/17,536.23 = 7,401.78/x
3. Step 3: Cross multiply
   12,706.74x = 17,536.23 × 7,401.78
4. Step 4: Simplify right side
   12,706.74x = 129,799,316.49
5. Step 5: Solve for x
   x = 129,799,316.49/12,706.74
6. Step 6: Final answer
   x = 10,215.00