Finding the Third Proportional to 143,574 and 213,961.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,574 : 213,961.50 = 213,961.50 : x
2. Step 2: Convert to fraction form
   143,574/213,961.50 = 213,961.50/x
3. Step 3: Cross multiply
   143,574x = 213,961.50 × 213,961.50
4. Step 4: Simplify right side
   143,574x = 45,779,523,482.25
5. Step 5: Solve for x
   x = 45,779,523,482.25/143,574
6. Step 6: Final answer
   x = 318,856.64