Finding the Third Proportional to 43,390.69 and 57,613.78

Step by Step Solution

1. Step 1: Write the proportion equation
   43,390.69 : 57,613.78 = 57,613.78 : x
2. Step 2: Convert to fraction form
   43,390.69/57,613.78 = 57,613.78/x
3. Step 3: Cross multiply
   43,390.69x = 57,613.78 × 57,613.78
4. Step 4: Simplify right side
   43,390.69x = 3,319,347,789.92
5. Step 5: Solve for x
   x = 3,319,347,789.92/43,390.69
6. Step 6: Final answer
   x = 76,499.08