Finding the Third Proportional to 77,430 and 109,042

Step by Step Solution

1. Step 1: Write the proportion equation
   77,430 : 109,042 = 109,042 : x
2. Step 2: Convert to fraction form
   77,430/109,042 = 109,042/x
3. Step 3: Cross multiply
   77,430x = 109,042 × 109,042
4. Step 4: Simplify right side
   77,430x = 11,890,157,764
5. Step 5: Solve for x
   x = 11,890,157,764/77,430
6. Step 6: Final answer
   x = 153,560.09