Finding the Third Proportional to 415,474.50 and 918,139.50

Step by Step Solution

1. Step 1: Write the proportion equation
   415,474.50 : 918,139.50 = 918,139.50 : x
2. Step 2: Convert to fraction form
   415,474.50/918,139.50 = 918,139.50/x
3. Step 3: Cross multiply
   415,474.50x = 918,139.50 × 918,139.50
4. Step 4: Simplify right side
   415,474.50x = 842,980,141,460.25
5. Step 5: Solve for x
   x = 842,980,141,460.25/415,474.50
6. Step 6: Final answer
   x = 2,028,957.59