Finding the Third Proportional to 210,976.50 and 429,786

Step by Step Solution

1. Step 1: Write the proportion equation
   210,976.50 : 429,786 = 429,786 : x
2. Step 2: Convert to fraction form
   210,976.50/429,786 = 429,786/x
3. Step 3: Cross multiply
   210,976.50x = 429,786 × 429,786
4. Step 4: Simplify right side
   210,976.50x = 184,716,005,796
5. Step 5: Solve for x
   x = 184,716,005,796/210,976.50
6. Step 6: Final answer
   x = 875,528.82