Finding the Fourth Proportional to 981.06, 1,351.89 and 700.80

Step by Step Solution

1. Step 1: Write the proportion equation
   981.06 : 1,351.89 = 700.80 : x
2. Step 2: Convert to fraction form
   981.06/1,351.89 = 700.80/x
3. Step 3: Cross multiply
   981.06x = 1,351.89 × 700.80
4. Step 4: Simplify right side
   981.06x = 947,404.51
5. Step 5: Solve for x
   x = 947,404.51/981.06
6. Step 6: Final answer
   x = 965.69