Finding the Third Proportional to 210,930 and 455,008.50

Step by Step Solution

1. Step 1: Write the proportion equation
   210,930 : 455,008.50 = 455,008.50 : x
2. Step 2: Convert to fraction form
   210,930/455,008.50 = 455,008.50/x
3. Step 3: Cross multiply
   210,930x = 455,008.50 × 455,008.50
4. Step 4: Simplify right side
   210,930x = 207,032,735,072.25
5. Step 5: Solve for x
   x = 207,032,735,072.25/210,930
6. Step 6: Final answer
   x = 981,523.42