Finding the Third Proportional to 105,415.50 and 231,340

Step by Step Solution

1. Step 1: Write the proportion equation
   105,415.50 : 231,340 = 231,340 : x
2. Step 2: Convert to fraction form
   105,415.50/231,340 = 231,340/x
3. Step 3: Cross multiply
   105,415.50x = 231,340 × 231,340
4. Step 4: Simplify right side
   105,415.50x = 53,518,195,600
5. Step 5: Solve for x
   x = 53,518,195,600/105,415.50
6. Step 6: Final answer
   x = 507,688.11