Finding the Fourth Proportional to 2,172.86, 2,997.72 and 1,427.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,172.86 : 2,997.72 = 1,427.22 : x
2. Step 2: Convert to fraction form
   2,172.86/2,997.72 = 1,427.22/x
3. Step 3: Cross multiply
   2,172.86x = 2,997.72 × 1,427.22
4. Step 4: Simplify right side
   2,172.86x = 4,278,405.94
5. Step 5: Solve for x
   x = 4,278,405.94/2,172.86
6. Step 6: Final answer
   x = 1,969.02