Finding the Third Proportional to 216,846 and 521,758.50

Step by Step Solution

1. Step 1: Write the proportion equation
   216,846 : 521,758.50 = 521,758.50 : x
2. Step 2: Convert to fraction form
   216,846/521,758.50 = 521,758.50/x
3. Step 3: Cross multiply
   216,846x = 521,758.50 × 521,758.50
4. Step 4: Simplify right side
   216,846x = 272,231,932,322.25
5. Step 5: Solve for x
   x = 272,231,932,322.25/216,846
6. Step 6: Final answer
   x = 1,255,415.97