Finding the Fourth Proportional to 12,435.59, 17,154.70 and 7,711.67

Step by Step Solution

1. Step 1: Write the proportion equation
   12,435.59 : 17,154.70 = 7,711.67 : x
2. Step 2: Convert to fraction form
   12,435.59/17,154.70 = 7,711.67/x
3. Step 3: Cross multiply
   12,435.59x = 17,154.70 × 7,711.67
4. Step 4: Simplify right side
   12,435.59x = 132,291,408.96
5. Step 5: Solve for x
   x = 132,291,408.96/12,435.59
6. Step 6: Final answer
   x = 10,638.13