Finding the Third Proportional to 668,558 and 1,430,428

Step by Step Solution

1. Step 1: Write the proportion equation
   668,558 : 1,430,428 = 1,430,428 : x
2. Step 2: Convert to fraction form
   668,558/1,430,428 = 1,430,428/x
3. Step 3: Cross multiply
   668,558x = 1,430,428 × 1,430,428
4. Step 4: Simplify right side
   668,558x = 2,046,124,263,184
5. Step 5: Solve for x
   x = 2,046,124,263,184/668,558
6. Step 6: Final answer
   x = 3,060,503.75