Finding the Fourth Proportional to 3,447.56, 5,170.62 and 981.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,447.56 : 5,170.62 = 981.72 : x
2. Step 2: Convert to fraction form
   3,447.56/5,170.62 = 981.72/x
3. Step 3: Cross multiply
   3,447.56x = 5,170.62 × 981.72
4. Step 4: Simplify right side
   3,447.56x = 5,076,101.07
5. Step 5: Solve for x
   x = 5,076,101.07/3,447.56
6. Step 6: Final answer
   x = 1,472.37