Finding the Third Proportional to 117,128 and 250,780

Step by Step Solution

1. Step 1: Write the proportion equation
   117,128 : 250,780 = 250,780 : x
2. Step 2: Convert to fraction form
   117,128/250,780 = 250,780/x
3. Step 3: Cross multiply
   117,128x = 250,780 × 250,780
4. Step 4: Simplify right side
   117,128x = 62,890,608,400
5. Step 5: Solve for x
   x = 62,890,608,400/117,128
6. Step 6: Final answer
   x = 536,939.15