Finding the Third Proportional to 191,614 and 290,072

Step by Step Solution

1. Step 1: Write the proportion equation
   191,614 : 290,072 = 290,072 : x
2. Step 2: Convert to fraction form
   191,614/290,072 = 290,072/x
3. Step 3: Cross multiply
   191,614x = 290,072 × 290,072
4. Step 4: Simplify right side
   191,614x = 84,141,765,184
5. Step 5: Solve for x
   x = 84,141,765,184/191,614
6. Step 6: Final answer
   x = 439,121.18