Finding the Third Proportional to 31,118.50 and 68,284

Step by Step Solution

1. Step 1: Write the proportion equation
   31,118.50 : 68,284 = 68,284 : x
2. Step 2: Convert to fraction form
   31,118.50/68,284 = 68,284/x
3. Step 3: Cross multiply
   31,118.50x = 68,284 × 68,284
4. Step 4: Simplify right side
   31,118.50x = 4,662,704,656
5. Step 5: Solve for x
   x = 4,662,704,656/31,118.50
6. Step 6: Final answer
   x = 149,837.06