Finding the Third Proportional to 138,224 and 216,870.50

Step by Step Solution

1. Step 1: Write the proportion equation
   138,224 : 216,870.50 = 216,870.50 : x
2. Step 2: Convert to fraction form
   138,224/216,870.50 = 216,870.50/x
3. Step 3: Cross multiply
   138,224x = 216,870.50 × 216,870.50
4. Step 4: Simplify right side
   138,224x = 47,032,813,770.25
5. Step 5: Solve for x
   x = 47,032,813,770.25/138,224
6. Step 6: Final answer
   x = 340,265.18