Finding the Third Proportional to 38,878.31 and 85,149.56

Step by Step Solution

1. Step 1: Write the proportion equation
   38,878.31 : 85,149.56 = 85,149.56 : x
2. Step 2: Convert to fraction form
   38,878.31/85,149.56 = 85,149.56/x
3. Step 3: Cross multiply
   38,878.31x = 85,149.56 × 85,149.56
4. Step 4: Simplify right side
   38,878.31x = 7,250,447,993.94
5. Step 5: Solve for x
   x = 7,250,447,993.94/38,878.31
6. Step 6: Final answer
   x = 186,490.81