Finding the Third Proportional to 139,902 and 302,140.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,902 : 302,140.50 = 302,140.50 : x
2. Step 2: Convert to fraction form
   139,902/302,140.50 = 302,140.50/x
3. Step 3: Cross multiply
   139,902x = 302,140.50 × 302,140.50
4. Step 4: Simplify right side
   139,902x = 91,288,881,740.25
5. Step 5: Solve for x
   x = 91,288,881,740.25/139,902
6. Step 6: Final answer
   x = 652,520.21