Finding the Third Proportional to 143,088 and 310,780.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,088 : 310,780.50 = 310,780.50 : x
2. Step 2: Convert to fraction form
   143,088/310,780.50 = 310,780.50/x
3. Step 3: Cross multiply
   143,088x = 310,780.50 × 310,780.50
4. Step 4: Simplify right side
   143,088x = 96,584,519,180.25
5. Step 5: Solve for x
   x = 96,584,519,180.25/143,088
6. Step 6: Final answer
   x = 675,000.83