Finding the Third Proportional to 143,496 and 312,826.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,496 : 312,826.50 = 312,826.50 : x
2. Step 2: Convert to fraction form
   143,496/312,826.50 = 312,826.50/x
3. Step 3: Cross multiply
   143,496x = 312,826.50 × 312,826.50
4. Step 4: Simplify right side
   143,496x = 97,860,419,102.25
5. Step 5: Solve for x
   x = 97,860,419,102.25/143,496
6. Step 6: Final answer
   x = 681,973.15