Finding the Third Proportional to 4,279.50 and 7,404.75

Step by Step Solution

1. Step 1: Write the proportion equation
   4,279.50 : 7,404.75 = 7,404.75 : x
2. Step 2: Convert to fraction form
   4,279.50/7,404.75 = 7,404.75/x
3. Step 3: Cross multiply
   4,279.50x = 7,404.75 × 7,404.75
4. Step 4: Simplify right side
   4,279.50x = 54,830,322.56
5. Step 5: Solve for x
   x = 54,830,322.56/4,279.50
6. Step 6: Final answer
   x = 12,812.32