Finding the Third Proportional to 786,456 and 1,186,128

Step by Step Solution

1. Step 1: Write the proportion equation
   786,456 : 1,186,128 = 1,186,128 : x
2. Step 2: Convert to fraction form
   786,456/1,186,128 = 1,186,128/x
3. Step 3: Cross multiply
   786,456x = 1,186,128 × 1,186,128
4. Step 4: Simplify right side
   786,456x = 1,406,899,632,384
5. Step 5: Solve for x
   x = 1,406,899,632,384/786,456
6. Step 6: Final answer
   x = 1,788,910.80