Finding the Fourth Proportional to 3,172.50, 4,759.20 and 981.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,172.50 : 4,759.20 = 981.25 : x
2. Step 2: Convert to fraction form
   3,172.50/4,759.20 = 981.25/x
3. Step 3: Cross multiply
   3,172.50x = 4,759.20 × 981.25
4. Step 4: Simplify right side
   3,172.50x = 4,669,953.10
5. Step 5: Solve for x
   x = 4,669,953.10/3,172.50
6. Step 6: Final answer
   x = 1,472.01