Finding the Third Proportional to 50,611.50 and 78,570

Step by Step Solution

1. Step 1: Write the proportion equation
   50,611.50 : 78,570 = 78,570 : x
2. Step 2: Convert to fraction form
   50,611.50/78,570 = 78,570/x
3. Step 3: Cross multiply
   50,611.50x = 78,570 × 78,570
4. Step 4: Simplify right side
   50,611.50x = 6,173,244,900
5. Step 5: Solve for x
   x = 6,173,244,900/50,611.50
6. Step 6: Final answer
   x = 121,973.17