Finding the Third Proportional to 42,570 and 68,591.25

Step by Step Solution

1. Step 1: Write the proportion equation
   42,570 : 68,591.25 = 68,591.25 : x
2. Step 2: Convert to fraction form
   42,570/68,591.25 = 68,591.25/x
3. Step 3: Cross multiply
   42,570x = 68,591.25 × 68,591.25
4. Step 4: Simplify right side
   42,570x = 4,704,759,576.56
5. Step 5: Solve for x
   x = 4,704,759,576.56/42,570
6. Step 6: Final answer
   x = 110,518.20