Finding the Fourth Proportional to 2,647.35, 3,970.58 and 981.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,647.35 : 3,970.58 = 981.29 : x
2. Step 2: Convert to fraction form
   2,647.35/3,970.58 = 981.29/x
3. Step 3: Cross multiply
   2,647.35x = 3,970.58 × 981.29
4. Step 4: Simplify right side
   2,647.35x = 3,896,290.45
5. Step 5: Solve for x
   x = 3,896,290.45/2,647.35
6. Step 6: Final answer
   x = 1,471.77