Finding the Third Proportional to 219,091.50 and 279,063

Step by Step Solution

1. Step 1: Write the proportion equation
   219,091.50 : 279,063 = 279,063 : x
2. Step 2: Convert to fraction form
   219,091.50/279,063 = 279,063/x
3. Step 3: Cross multiply
   219,091.50x = 279,063 × 279,063
4. Step 4: Simplify right side
   219,091.50x = 77,876,157,969
5. Step 5: Solve for x
   x = 77,876,157,969/219,091.50
6. Step 6: Final answer
   x = 355,450.38