Finding the Third Proportional to 42,578.16 and 61,099.31

Step by Step Solution

1. Step 1: Write the proportion equation
   42,578.16 : 61,099.31 = 61,099.31 : x
2. Step 2: Convert to fraction form
   42,578.16/61,099.31 = 61,099.31/x
3. Step 3: Cross multiply
   42,578.16x = 61,099.31 × 61,099.31
4. Step 4: Simplify right side
   42,578.16x = 3,733,125,987.97
5. Step 5: Solve for x
   x = 3,733,125,987.97/42,578.16
6. Step 6: Final answer
   x = 87,677.02