Finding the Fourth Proportional to 978,109.20, 1,367,694 and 978,109.20

Step by Step Solution

1. Step 1: Write the proportion equation
   978,109.20 : 1,367,694 = 978,109.20 : x
2. Step 2: Convert to fraction form
   978,109.20/1,367,694 = 978,109.20/x
3. Step 3: Cross multiply
   978,109.20x = 1,367,694 × 978,109.20
4. Step 4: Simplify right side
   978,109.20x = 1,337,754,084,184.80
5. Step 5: Solve for x
   x = 1,337,754,084,184.80/978,109.20
6. Step 6: Final answer
   x = 1,367,694