Finding the Third Proportional to 191,616 and 290,076

Step by Step Solution

1. Step 1: Write the proportion equation
   191,616 : 290,076 = 290,076 : x
2. Step 2: Convert to fraction form
   191,616/290,076 = 290,076/x
3. Step 3: Cross multiply
   191,616x = 290,076 × 290,076
4. Step 4: Simplify right side
   191,616x = 84,144,085,776
5. Step 5: Solve for x
   x = 84,144,085,776/191,616
6. Step 6: Final answer
   x = 439,128.70