Finding the Fourth Proportional to 2,646.89, 3,970.86 and 797.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,646.89 : 3,970.86 = 797.93 : x
2. Step 2: Convert to fraction form
   2,646.89/3,970.86 = 797.93/x
3. Step 3: Cross multiply
   2,646.89x = 3,970.86 × 797.93
4. Step 4: Simplify right side
   2,646.89x = 3,168,444.48
5. Step 5: Solve for x
   x = 3,168,444.48/2,646.89
6. Step 6: Final answer
   x = 1,197.05