Finding the Third Proportional to 139,899.38 and 299,745

Step by Step Solution

1. Step 1: Write the proportion equation
   139,899.38 : 299,745 = 299,745 : x
2. Step 2: Convert to fraction form
   139,899.38/299,745 = 299,745/x
3. Step 3: Cross multiply
   139,899.38x = 299,745 × 299,745
4. Step 4: Simplify right side
   139,899.38x = 89,847,065,025
5. Step 5: Solve for x
   x = 89,847,065,025/139,899.38
6. Step 6: Final answer
   x = 642,226.35