Finding the Third Proportional to 216,939 and 506,827.50

Step by Step Solution

1. Step 1: Write the proportion equation
   216,939 : 506,827.50 = 506,827.50 : x
2. Step 2: Convert to fraction form
   216,939/506,827.50 = 506,827.50/x
3. Step 3: Cross multiply
   216,939x = 506,827.50 × 506,827.50
4. Step 4: Simplify right side
   216,939x = 256,874,114,756.25
5. Step 5: Solve for x
   x = 256,874,114,756.25/216,939
6. Step 6: Final answer
   x = 1,184,084.53