Finding the Third Proportional to 43,390.69 and 56,155.78

Step by Step Solution

1. Step 1: Write the proportion equation
   43,390.69 : 56,155.78 = 56,155.78 : x
2. Step 2: Convert to fraction form
   43,390.69/56,155.78 = 56,155.78/x
3. Step 3: Cross multiply
   43,390.69x = 56,155.78 × 56,155.78
4. Step 4: Simplify right side
   43,390.69x = 3,153,471,767.80
5. Step 5: Solve for x
   x = 3,153,471,767.80/43,390.69
6. Step 6: Final answer
   x = 72,676.23