Finding the Third Proportional to 191,313.50 and 276,558

Step by Step Solution

1. Step 1: Write the proportion equation
   191,313.50 : 276,558 = 276,558 : x
2. Step 2: Convert to fraction form
   191,313.50/276,558 = 276,558/x
3. Step 3: Cross multiply
   191,313.50x = 276,558 × 276,558
4. Step 4: Simplify right side
   191,313.50x = 76,484,327,364
5. Step 5: Solve for x
   x = 76,484,327,364/191,313.50
6. Step 6: Final answer
   x = 399,785.31