Finding the Third Proportional to 139,074.75 and 199,134

Step by Step Solution

1. Step 1: Write the proportion equation
   139,074.75 : 199,134 = 199,134 : x
2. Step 2: Convert to fraction form
   139,074.75/199,134 = 199,134/x
3. Step 3: Cross multiply
   139,074.75x = 199,134 × 199,134
4. Step 4: Simplify right side
   139,074.75x = 39,654,349,956
5. Step 5: Solve for x
   x = 39,654,349,956/139,074.75
6. Step 6: Final answer
   x = 285,129.76