Finding the Third Proportional to 42,759 and 66,379.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,759 : 66,379.50 = 66,379.50 : x
2. Step 2: Convert to fraction form
   42,759/66,379.50 = 66,379.50/x
3. Step 3: Cross multiply
   42,759x = 66,379.50 × 66,379.50
4. Step 4: Simplify right side
   42,759x = 4,406,238,020.25
5. Step 5: Solve for x
   x = 4,406,238,020.25/42,759
6. Step 6: Final answer
   x = 103,048.20