Finding the Third Proportional to 191,017.50 and 279,757.50

Step by Step Solution

1. Step 1: Write the proportion equation
   191,017.50 : 279,757.50 = 279,757.50 : x
2. Step 2: Convert to fraction form
   191,017.50/279,757.50 = 279,757.50/x
3. Step 3: Cross multiply
   191,017.50x = 279,757.50 × 279,757.50
4. Step 4: Simplify right side
   191,017.50x = 78,264,258,806.25
5. Step 5: Solve for x
   x = 78,264,258,806.25/191,017.50
6. Step 6: Final answer
   x = 409,722.98