Finding the Third Proportional to 143,103 and 310,789.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,103 : 310,789.50 = 310,789.50 : x
2. Step 2: Convert to fraction form
   143,103/310,789.50 = 310,789.50/x
3. Step 3: Cross multiply
   143,103x = 310,789.50 × 310,789.50
4. Step 4: Simplify right side
   143,103x = 96,590,113,310.25
5. Step 5: Solve for x
   x = 96,590,113,310.25/143,103
6. Step 6: Final answer
   x = 674,969.17