Finding the Third Proportional to 57,390 and 76,972.50

Step by Step Solution

1. Step 1: Write the proportion equation
   57,390 : 76,972.50 = 76,972.50 : x
2. Step 2: Convert to fraction form
   57,390/76,972.50 = 76,972.50/x
3. Step 3: Cross multiply
   57,390x = 76,972.50 × 76,972.50
4. Step 4: Simplify right side
   57,390x = 5,924,765,756.25
5. Step 5: Solve for x
   x = 5,924,765,756.25/57,390
6. Step 6: Final answer
   x = 103,236.90