Finding the Third Proportional to 210,964 and 429,761.50

Step by Step Solution

1. Step 1: Write the proportion equation
   210,964 : 429,761.50 = 429,761.50 : x
2. Step 2: Convert to fraction form
   210,964/429,761.50 = 429,761.50/x
3. Step 3: Cross multiply
   210,964x = 429,761.50 × 429,761.50
4. Step 4: Simplify right side
   210,964x = 184,694,946,882.25
5. Step 5: Solve for x
   x = 184,694,946,882.25/210,964
6. Step 6: Final answer
   x = 875,480.87