Finding the Third Proportional to 89,353.50 and 138,931

Step by Step Solution

1. Step 1: Write the proportion equation
   89,353.50 : 138,931 = 138,931 : x
2. Step 2: Convert to fraction form
   89,353.50/138,931 = 138,931/x
3. Step 3: Cross multiply
   89,353.50x = 138,931 × 138,931
4. Step 4: Simplify right side
   89,353.50x = 19,301,822,761
5. Step 5: Solve for x
   x = 19,301,822,761/89,353.50
6. Step 6: Final answer
   x = 216,016.42