Finding the Third Proportional to 42,175.69 and 57,856.78

Step by Step Solution

1. Step 1: Write the proportion equation
   42,175.69 : 57,856.78 = 57,856.78 : x
2. Step 2: Convert to fraction form
   42,175.69/57,856.78 = 57,856.78/x
3. Step 3: Cross multiply
   42,175.69x = 57,856.78 × 57,856.78
4. Step 4: Simplify right side
   42,175.69x = 3,347,407,136.61
5. Step 5: Solve for x
   x = 3,347,407,136.61/42,175.69
6. Step 6: Final answer
   x = 79,368.17