Finding the Third Proportional to 139,002.75 and 305,069.63

Step by Step Solution

1. Step 1: Write the proportion equation
   139,002.75 : 305,069.63 = 305,069.63 : x
2. Step 2: Convert to fraction form
   139,002.75/305,069.63 = 305,069.63/x
3. Step 3: Cross multiply
   139,002.75x = 305,069.63 × 305,069.63
4. Step 4: Simplify right side
   139,002.75x = 93,067,476,097.64
5. Step 5: Solve for x
   x = 93,067,476,097.64/139,002.75
6. Step 6: Final answer
   x = 669,536.94