Finding the Third Proportional to 139,417.50 and 216,184.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,417.50 : 216,184.50 = 216,184.50 : x
2. Step 2: Convert to fraction form
   139,417.50/216,184.50 = 216,184.50/x
3. Step 3: Cross multiply
   139,417.50x = 216,184.50 × 216,184.50
4. Step 4: Simplify right side
   139,417.50x = 46,735,738,040.25
5. Step 5: Solve for x
   x = 46,735,738,040.25/139,417.50
6. Step 6: Final answer
   x = 335,221.46