Finding the Third Proportional to 139,473 and 207,157.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,473 : 207,157.50 = 207,157.50 : x
2. Step 2: Convert to fraction form
   139,473/207,157.50 = 207,157.50/x
3. Step 3: Cross multiply
   139,473x = 207,157.50 × 207,157.50
4. Step 4: Simplify right side
   139,473x = 42,914,229,806.25
5. Step 5: Solve for x
   x = 42,914,229,806.25/139,473
6. Step 6: Final answer
   x = 307,688.44