Finding the Third Proportional to 415,053 and 641,007.50

Step by Step Solution

1. Step 1: Write the proportion equation
   415,053 : 641,007.50 = 641,007.50 : x
2. Step 2: Convert to fraction form
   415,053/641,007.50 = 641,007.50/x
3. Step 3: Cross multiply
   415,053x = 641,007.50 × 641,007.50
4. Step 4: Simplify right side
   415,053x = 410,890,615,056.25
5. Step 5: Solve for x
   x = 410,890,615,056.25/415,053
6. Step 6: Final answer
   x = 989,971.44