Finding the Third Proportional to 780,424 and 1,140,828

Step by Step Solution

1. Step 1: Write the proportion equation
   780,424 : 1,140,828 = 1,140,828 : x
2. Step 2: Convert to fraction form
   780,424/1,140,828 = 1,140,828/x
3. Step 3: Cross multiply
   780,424x = 1,140,828 × 1,140,828
4. Step 4: Simplify right side
   780,424x = 1,301,488,525,584
5. Step 5: Solve for x
   x = 1,301,488,525,584/780,424
6. Step 6: Final answer
   x = 1,667,668.51