Finding the Third Proportional to 139,062 and 299,089.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,062 : 299,089.50 = 299,089.50 : x
2. Step 2: Convert to fraction form
   139,062/299,089.50 = 299,089.50/x
3. Step 3: Cross multiply
   139,062x = 299,089.50 × 299,089.50
4. Step 4: Simplify right side
   139,062x = 89,454,529,010.25
5. Step 5: Solve for x
   x = 89,454,529,010.25/139,062
6. Step 6: Final answer
   x = 643,270.84