Finding the Third Proportional to 42,858 and 62,611.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,858 : 62,611.50 = 62,611.50 : x
2. Step 2: Convert to fraction form
   42,858/62,611.50 = 62,611.50/x
3. Step 3: Cross multiply
   42,858x = 62,611.50 × 62,611.50
4. Step 4: Simplify right side
   42,858x = 3,920,199,932.25
5. Step 5: Solve for x
   x = 3,920,199,932.25/42,858
6. Step 6: Final answer
   x = 91,469.50