Finding the Third Proportional to 99,276 and 138,870

Step by Step Solution

1. Step 1: Write the proportion equation
   99,276 : 138,870 = 138,870 : x
2. Step 2: Convert to fraction form
   99,276/138,870 = 138,870/x
3. Step 3: Cross multiply
   99,276x = 138,870 × 138,870
4. Step 4: Simplify right side
   99,276x = 19,284,876,900
5. Step 5: Solve for x
   x = 19,284,876,900/99,276
6. Step 6: Final answer
   x = 194,255.18