Finding the Third Proportional to 4,308 and 5,611.50

Step by Step Solution

1. Step 1: Write the proportion equation
   4,308 : 5,611.50 = 5,611.50 : x
2. Step 2: Convert to fraction form
   4,308/5,611.50 = 5,611.50/x
3. Step 3: Cross multiply
   4,308x = 5,611.50 × 5,611.50
4. Step 4: Simplify right side
   4,308x = 31,488,932.25
5. Step 5: Solve for x
   x = 31,488,932.25/4,308
6. Step 6: Final answer
   x = 7,309.41