Finding the Third Proportional to 57,274.50 and 87,390.75

Step by Step Solution

1. Step 1: Write the proportion equation
   57,274.50 : 87,390.75 = 87,390.75 : x
2. Step 2: Convert to fraction form
   57,274.50/87,390.75 = 87,390.75/x
3. Step 3: Cross multiply
   57,274.50x = 87,390.75 × 87,390.75
4. Step 4: Simplify right side
   57,274.50x = 7,637,143,185.56
5. Step 5: Solve for x
   x = 7,637,143,185.56/57,274.50
6. Step 6: Final answer
   x = 133,342.82