Finding the Third Proportional to 131,994 and 216,688.50

Step by Step Solution

1. Step 1: Write the proportion equation
   131,994 : 216,688.50 = 216,688.50 : x
2. Step 2: Convert to fraction form
   131,994/216,688.50 = 216,688.50/x
3. Step 3: Cross multiply
   131,994x = 216,688.50 × 216,688.50
4. Step 4: Simplify right side
   131,994x = 46,953,906,032.25
5. Step 5: Solve for x
   x = 46,953,906,032.25/131,994
6. Step 6: Final answer
   x = 355,727.58