Finding the Third Proportional to 139,056.75 and 299,079

Step by Step Solution

1. Step 1: Write the proportion equation
   139,056.75 : 299,079 = 299,079 : x
2. Step 2: Convert to fraction form
   139,056.75/299,079 = 299,079/x
3. Step 3: Cross multiply
   139,056.75x = 299,079 × 299,079
4. Step 4: Simplify right side
   139,056.75x = 89,448,248,241
5. Step 5: Solve for x
   x = 89,448,248,241/139,056.75
6. Step 6: Final answer
   x = 643,249.96