Finding the Third Proportional to 143,011.50 and 210,386.25

Step by Step Solution

1. Step 1: Write the proportion equation
   143,011.50 : 210,386.25 = 210,386.25 : x
2. Step 2: Convert to fraction form
   143,011.50/210,386.25 = 210,386.25/x
3. Step 3: Cross multiply
   143,011.50x = 210,386.25 × 210,386.25
4. Step 4: Simplify right side
   143,011.50x = 44,262,374,189.06
5. Step 5: Solve for x
   x = 44,262,374,189.06/143,011.50
6. Step 6: Final answer
   x = 309,502.20