Finding the Fourth Proportional to 7,131.45, 10,688.25 and 3,432.69

Step by Step Solution

1. Step 1: Write the proportion equation
   7,131.45 : 10,688.25 = 3,432.69 : x
2. Step 2: Convert to fraction form
   7,131.45/10,688.25 = 3,432.69/x
3. Step 3: Cross multiply
   7,131.45x = 10,688.25 × 3,432.69
4. Step 4: Simplify right side
   7,131.45x = 36,689,448.89
5. Step 5: Solve for x
   x = 36,689,448.89/7,131.45
6. Step 6: Final answer
   x = 5,144.74