Finding the Third Proportional to 191,606 and 290,060

Step by Step Solution

1. Step 1: Write the proportion equation
   191,606 : 290,060 = 290,060 : x
2. Step 2: Convert to fraction form
   191,606/290,060 = 290,060/x
3. Step 3: Cross multiply
   191,606x = 290,060 × 290,060
4. Step 4: Simplify right side
   191,606x = 84,134,803,600
5. Step 5: Solve for x
   x = 84,134,803,600/191,606
6. Step 6: Final answer
   x = 439,103.18