Finding the Third Proportional to 42,667.50 and 56,618

Step by Step Solution

1. Step 1: Write the proportion equation
   42,667.50 : 56,618 = 56,618 : x
2. Step 2: Convert to fraction form
   42,667.50/56,618 = 56,618/x
3. Step 3: Cross multiply
   42,667.50x = 56,618 × 56,618
4. Step 4: Simplify right side
   42,667.50x = 3,205,597,924
5. Step 5: Solve for x
   x = 3,205,597,924/42,667.50
6. Step 6: Final answer
   x = 75,129.73