Finding the Third Proportional to 212,407.50 and 296,979

Step by Step Solution

1. Step 1: Write the proportion equation
   212,407.50 : 296,979 = 296,979 : x
2. Step 2: Convert to fraction form
   212,407.50/296,979 = 296,979/x
3. Step 3: Cross multiply
   212,407.50x = 296,979 × 296,979
4. Step 4: Simplify right side
   212,407.50x = 88,196,526,441
5. Step 5: Solve for x
   x = 88,196,526,441/212,407.50
6. Step 6: Final answer
   x = 415,223.22