Finding the Third Proportional to 139,891.50 and 301,891.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,891.50 : 301,891.50 = 301,891.50 : x
2. Step 2: Convert to fraction form
   139,891.50/301,891.50 = 301,891.50/x
3. Step 3: Cross multiply
   139,891.50x = 301,891.50 × 301,891.50
4. Step 4: Simplify right side
   139,891.50x = 91,138,477,772.25
5. Step 5: Solve for x
   x = 91,138,477,772.25/139,891.50
6. Step 6: Final answer
   x = 651,494.03