Finding the Fourth Proportional to 2,156.06, 2,975.38 and 1,224.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156.06 : 2,975.38 = 1,224.56 : x
2. Step 2: Convert to fraction form
   2,156.06/2,975.38 = 1,224.56/x
3. Step 3: Cross multiply
   2,156.06x = 2,975.38 × 1,224.56
4. Step 4: Simplify right side
   2,156.06x = 3,643,535.71
5. Step 5: Solve for x
   x = 3,643,535.71/2,156.06
6. Step 6: Final answer
   x = 1,689.90