Finding the Third Proportional to 357,862 and 780,028

Step by Step Solution

1. Step 1: Write the proportion equation
   357,862 : 780,028 = 780,028 : x
2. Step 2: Convert to fraction form
   357,862/780,028 = 780,028/x
3. Step 3: Cross multiply
   357,862x = 780,028 × 780,028
4. Step 4: Simplify right side
   357,862x = 608,443,680,784
5. Step 5: Solve for x
   x = 608,443,680,784/357,862
6. Step 6: Final answer
   x = 1,700,218.75