Finding the Fourth Proportional to 2,971.51, 4,456.89 and 780.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,971.51 : 4,456.89 = 780.41 : x
2. Step 2: Convert to fraction form
   2,971.51/4,456.89 = 780.41/x
3. Step 3: Cross multiply
   2,971.51x = 4,456.89 × 780.41
4. Step 4: Simplify right side
   2,971.51x = 3,478,201.52
5. Step 5: Solve for x
   x = 3,478,201.52/2,971.51
6. Step 6: Final answer
   x = 1,170.52