Finding the Third Proportional to 191,674.69 and 278,586

Step by Step Solution

1. Step 1: Write the proportion equation
   191,674.69 : 278,586 = 278,586 : x
2. Step 2: Convert to fraction form
   191,674.69/278,586 = 278,586/x
3. Step 3: Cross multiply
   191,674.69x = 278,586 × 278,586
4. Step 4: Simplify right side
   191,674.69x = 77,610,159,396
5. Step 5: Solve for x
   x = 77,610,159,396/191,674.69
6. Step 6: Final answer
   x = 404,905.63