Finding the Third Proportional to 391,410 and 606,054.50

Step by Step Solution

1. Step 1: Write the proportion equation
   391,410 : 606,054.50 = 606,054.50 : x
2. Step 2: Convert to fraction form
   391,410/606,054.50 = 606,054.50/x
3. Step 3: Cross multiply
   391,410x = 606,054.50 × 606,054.50
4. Step 4: Simplify right side
   391,410x = 367,302,056,970.25
5. Step 5: Solve for x
   x = 367,302,056,970.25/391,410
6. Step 6: Final answer
   x = 938,407.44