Finding the Third Proportional to 90,354 and 139,627

Step by Step Solution

1. Step 1: Write the proportion equation
   90,354 : 139,627 = 139,627 : x
2. Step 2: Convert to fraction form
   90,354/139,627 = 139,627/x
3. Step 3: Cross multiply
   90,354x = 139,627 × 139,627
4. Step 4: Simplify right side
   90,354x = 19,495,699,129
5. Step 5: Solve for x
   x = 19,495,699,129/90,354
6. Step 6: Final answer
   x = 215,770.18