Finding the Third Proportional to 215,680 and 468,619.50

Step by Step Solution

1. Step 1: Write the proportion equation
   215,680 : 468,619.50 = 468,619.50 : x
2. Step 2: Convert to fraction form
   215,680/468,619.50 = 468,619.50/x
3. Step 3: Cross multiply
   215,680x = 468,619.50 × 468,619.50
4. Step 4: Simplify right side
   215,680x = 219,604,235,780.25
5. Step 5: Solve for x
   x = 219,604,235,780.25/215,680
6. Step 6: Final answer
   x = 1,018,194.71