Finding the Third Proportional to 65,479.50 and 142,953.38

Step by Step Solution

1. Step 1: Write the proportion equation
   65,479.50 : 142,953.38 = 142,953.38 : x
2. Step 2: Convert to fraction form
   65,479.50/142,953.38 = 142,953.38/x
3. Step 3: Cross multiply
   65,479.50x = 142,953.38 × 142,953.38
4. Step 4: Simplify right side
   65,479.50x = 20,435,667,423.89
5. Step 5: Solve for x
   x = 20,435,667,423.89/65,479.50
6. Step 6: Final answer
   x = 312,092.60