Finding the Fourth Proportional to 2,154.56, 2,973.41 and 1,210.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,154.56 : 2,973.41 = 1,210.42 : x
2. Step 2: Convert to fraction form
   2,154.56/2,973.41 = 1,210.42/x
3. Step 3: Cross multiply
   2,154.56x = 2,973.41 × 1,210.42
4. Step 4: Simplify right side
   2,154.56x = 3,599,077.14
5. Step 5: Solve for x
   x = 3,599,077.14/2,154.56
6. Step 6: Final answer
   x = 1,670.45