Finding the Third Proportional to 149,715 and 215,227.50

Step by Step Solution

1. Step 1: Write the proportion equation
   149,715 : 215,227.50 = 215,227.50 : x
2. Step 2: Convert to fraction form
   149,715/215,227.50 = 215,227.50/x
3. Step 3: Cross multiply
   149,715x = 215,227.50 × 215,227.50
4. Step 4: Simplify right side
   149,715x = 46,322,876,756.25
5. Step 5: Solve for x
   x = 46,322,876,756.25/149,715
6. Step 6: Final answer
   x = 309,407.05