Finding the Third Proportional to 786,129 and 1,186,665

Step by Step Solution

1. Step 1: Write the proportion equation
   786,129 : 1,186,665 = 1,186,665 : x
2. Step 2: Convert to fraction form
   786,129/1,186,665 = 1,186,665/x
3. Step 3: Cross multiply
   786,129x = 1,186,665 × 1,186,665
4. Step 4: Simplify right side
   786,129x = 1,408,173,822,225
5. Step 5: Solve for x
   x = 1,408,173,822,225/786,129
6. Step 6: Final answer
   x = 1,791,275.76