Finding the Third Proportional to 615,388 and 1,329,191

Step by Step Solution

1. Step 1: Write the proportion equation
   615,388 : 1,329,191 = 1,329,191 : x
2. Step 2: Convert to fraction form
   615,388/1,329,191 = 1,329,191/x
3. Step 3: Cross multiply
   615,388x = 1,329,191 × 1,329,191
4. Step 4: Simplify right side
   615,388x = 1,766,748,714,481
5. Step 5: Solve for x
   x = 1,766,748,714,481/615,388
6. Step 6: Final answer
   x = 2,870,950.87