Finding the Fourth Proportional to 2,172.76, 3,259.98 and 923.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,172.76 : 3,259.98 = 923.67 : x
2. Step 2: Convert to fraction form
   2,172.76/3,259.98 = 923.67/x
3. Step 3: Cross multiply
   2,172.76x = 3,259.98 × 923.67
4. Step 4: Simplify right side
   2,172.76x = 3,011,145.73
5. Step 5: Solve for x
   x = 3,011,145.73/2,172.76
6. Step 6: Final answer
   x = 1,385.86