Finding the Third Proportional to 139,631.50 and 301,402.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,631.50 : 301,402.50 = 301,402.50 : x
2. Step 2: Convert to fraction form
   139,631.50/301,402.50 = 301,402.50/x
3. Step 3: Cross multiply
   139,631.50x = 301,402.50 × 301,402.50
4. Step 4: Simplify right side
   139,631.50x = 90,843,467,006.25
5. Step 5: Solve for x
   x = 90,843,467,006.25/139,631.50
6. Step 6: Final answer
   x = 650,594.36