Finding the Third Proportional to 615,390 and 1,329,196

Step by Step Solution

1. Step 1: Write the proportion equation
   615,390 : 1,329,196 = 1,329,196 : x
2. Step 2: Convert to fraction form
   615,390/1,329,196 = 1,329,196/x
3. Step 3: Cross multiply
   615,390x = 1,329,196 × 1,329,196
4. Step 4: Simplify right side
   615,390x = 1,766,762,006,416
5. Step 5: Solve for x
   x = 1,766,762,006,416/615,390
6. Step 6: Final answer
   x = 2,870,963.14