Finding the Third Proportional to 139,871.50 and 301,855.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,871.50 : 301,855.50 = 301,855.50 : x
2. Step 2: Convert to fraction form
   139,871.50/301,855.50 = 301,855.50/x
3. Step 3: Cross multiply
   139,871.50x = 301,855.50 × 301,855.50
4. Step 4: Simplify right side
   139,871.50x = 91,116,742,880.25
5. Step 5: Solve for x
   x = 91,116,742,880.25/139,871.50
6. Step 6: Final answer
   x = 651,431.80