Finding the Third Proportional to 391,410 and 606,054

Step by Step Solution

1. Step 1: Write the proportion equation
   391,410 : 606,054 = 606,054 : x
2. Step 2: Convert to fraction form
   391,410/606,054 = 606,054/x
3. Step 3: Cross multiply
   391,410x = 606,054 × 606,054
4. Step 4: Simplify right side
   391,410x = 367,301,450,916
5. Step 5: Solve for x
   x = 367,301,450,916/391,410
6. Step 6: Final answer
   x = 938,405.89