Finding the Fourth Proportional to 2,661,404.70, 3,992,107.05 and 978,159.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,661,404.70 : 3,992,107.05 = 978,159.90 : x
2. Step 2: Convert to fraction form
   2,661,404.70/3,992,107.05 = 978,159.90/x
3. Step 3: Cross multiply
   2,661,404.70x = 3,992,107.05 × 978,159.90
4. Step 4: Simplify right side
   2,661,404.70x = 3,904,919,032,817.30
5. Step 5: Solve for x
   x = 3,904,919,032,817.30/2,661,404.70
6. Step 6: Final answer
   x = 1,467,239.85