Finding the Fourth Proportional to 1,040,128.45, 1,557,082.28 and 978,611.65

Step by Step Solution

1. Step 1: Write the proportion equation
   1,040,128.45 : 1,557,082.28 = 978,611.65 : x
2. Step 2: Convert to fraction form
   1,040,128.45/1,557,082.28 = 978,611.65/x
3. Step 3: Cross multiply
   1,040,128.45x = 1,557,082.28 × 978,611.65
4. Step 4: Simplify right side
   1,040,128.45x = 1,523,778,854,323.50
5. Step 5: Solve for x
   x = 1,523,778,854,323.50/1,040,128.45
6. Step 6: Final answer
   x = 1,464,991.03