Finding the Fourth Proportional to 2,172.72, 2,997.60 and 1,332.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,172.72 : 2,997.60 = 1,332.78 : x
2. Step 2: Convert to fraction form
   2,172.72/2,997.60 = 1,332.78/x
3. Step 3: Cross multiply
   2,172.72x = 2,997.60 × 1,332.78
4. Step 4: Simplify right side
   2,172.72x = 3,995,141.33
5. Step 5: Solve for x
   x = 3,995,141.33/2,172.72
6. Step 6: Final answer
   x = 1,838.77