Finding the Third Proportional to 38,790 and 56,670

Step by Step Solution

1. Step 1: Write the proportion equation
   38,790 : 56,670 = 56,670 : x
2. Step 2: Convert to fraction form
   38,790/56,670 = 56,670/x
3. Step 3: Cross multiply
   38,790x = 56,670 × 56,670
4. Step 4: Simplify right side
   38,790x = 3,211,488,900
5. Step 5: Solve for x
   x = 3,211,488,900/38,790
6. Step 6: Final answer
   x = 82,791.67