Finding the Third Proportional to 210,963 and 429,760

Step by Step Solution

1. Step 1: Write the proportion equation
   210,963 : 429,760 = 429,760 : x
2. Step 2: Convert to fraction form
   210,963/429,760 = 429,760/x
3. Step 3: Cross multiply
   210,963x = 429,760 × 429,760
4. Step 4: Simplify right side
   210,963x = 184,693,657,600
5. Step 5: Solve for x
   x = 184,693,657,600/210,963
6. Step 6: Final answer
   x = 875,478.91