Finding the Third Proportional to 18,156.66 and 37,687.78

Step by Step Solution

1. Step 1: Write the proportion equation
   18,156.66 : 37,687.78 = 37,687.78 : x
2. Step 2: Convert to fraction form
   18,156.66/37,687.78 = 37,687.78/x
3. Step 3: Cross multiply
   18,156.66x = 37,687.78 × 37,687.78
4. Step 4: Simplify right side
   18,156.66x = 1,420,368,855.55
5. Step 5: Solve for x
   x = 1,420,368,855.55/18,156.66
6. Step 6: Final answer
   x = 78,228.55