Finding the Third Proportional to 141,966.50 and 312,738

Step by Step Solution

1. Step 1: Write the proportion equation
   141,966.50 : 312,738 = 312,738 : x
2. Step 2: Convert to fraction form
   141,966.50/312,738 = 312,738/x
3. Step 3: Cross multiply
   141,966.50x = 312,738 × 312,738
4. Step 4: Simplify right side
   141,966.50x = 97,805,056,644
5. Step 5: Solve for x
   x = 97,805,056,644/141,966.50
6. Step 6: Final answer
   x = 688,930.53