Finding the Third Proportional to 78,820.50 and 118,311

Step by Step Solution

1. Step 1: Write the proportion equation
   78,820.50 : 118,311 = 118,311 : x
2. Step 2: Convert to fraction form
   78,820.50/118,311 = 118,311/x
3. Step 3: Cross multiply
   78,820.50x = 118,311 × 118,311
4. Step 4: Simplify right side
   78,820.50x = 13,997,492,721
5. Step 5: Solve for x
   x = 13,997,492,721/78,820.50
6. Step 6: Final answer
   x = 177,586.96