Finding the Third Proportional to 847,090 and 1,242,378

Step by Step Solution

1. Step 1: Write the proportion equation
   847,090 : 1,242,378 = 1,242,378 : x
2. Step 2: Convert to fraction form
   847,090/1,242,378 = 1,242,378/x
3. Step 3: Cross multiply
   847,090x = 1,242,378 × 1,242,378
4. Step 4: Simplify right side
   847,090x = 1,543,503,094,884
5. Step 5: Solve for x
   x = 1,543,503,094,884/847,090
6. Step 6: Final answer
   x = 1,822,124.09