Finding the Third Proportional to 66,930 and 89,229

Step by Step Solution

1. Step 1: Write the proportion equation
   66,930 : 89,229 = 89,229 : x
2. Step 2: Convert to fraction form
   66,930/89,229 = 89,229/x
3. Step 3: Cross multiply
   66,930x = 89,229 × 89,229
4. Step 4: Simplify right side
   66,930x = 7,961,814,441
5. Step 5: Solve for x
   x = 7,961,814,441/66,930
6. Step 6: Final answer
   x = 118,957.34