Finding the Third Proportional to 78,461.50 and 171,503

Step by Step Solution

1. Step 1: Write the proportion equation
   78,461.50 : 171,503 = 171,503 : x
2. Step 2: Convert to fraction form
   78,461.50/171,503 = 171,503/x
3. Step 3: Cross multiply
   78,461.50x = 171,503 × 171,503
4. Step 4: Simplify right side
   78,461.50x = 29,413,279,009
5. Step 5: Solve for x
   x = 29,413,279,009/78,461.50
6. Step 6: Final answer
   x = 374,875.31