Finding the Third Proportional to 91,884.50 and 139,212

Step by Step Solution

1. Step 1: Write the proportion equation
   91,884.50 : 139,212 = 139,212 : x
2. Step 2: Convert to fraction form
   91,884.50/139,212 = 139,212/x
3. Step 3: Cross multiply
   91,884.50x = 139,212 × 139,212
4. Step 4: Simplify right side
   91,884.50x = 19,379,980,944
5. Step 5: Solve for x
   x = 19,379,980,944/91,884.50
6. Step 6: Final answer
   x = 210,916.76