Finding the Third Proportional to 42,799 and 64,328

Step by Step Solution

1. Step 1: Write the proportion equation
   42,799 : 64,328 = 64,328 : x
2. Step 2: Convert to fraction form
   42,799/64,328 = 64,328/x
3. Step 3: Cross multiply
   42,799x = 64,328 × 64,328
4. Step 4: Simplify right side
   42,799x = 4,138,091,584
5. Step 5: Solve for x
   x = 4,138,091,584/42,799
6. Step 6: Final answer
   x = 96,686.64