Finding the Third Proportional to 42,300 and 56,988

Step by Step Solution

1. Step 1: Write the proportion equation
   42,300 : 56,988 = 56,988 : x
2. Step 2: Convert to fraction form
   42,300/56,988 = 56,988/x
3. Step 3: Cross multiply
   42,300x = 56,988 × 56,988
4. Step 4: Simplify right side
   42,300x = 3,247,632,144
5. Step 5: Solve for x
   x = 3,247,632,144/42,300
6. Step 6: Final answer
   x = 76,776.17