Finding the Fourth Proportional to 2,146.01, 3,220.05 and 1,172.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,146.01 : 3,220.05 = 1,172.09 : x
2. Step 2: Convert to fraction form
   2,146.01/3,220.05 = 1,172.09/x
3. Step 3: Cross multiply
   2,146.01x = 3,220.05 × 1,172.09
4. Step 4: Simplify right side
   2,146.01x = 3,774,172.30
5. Step 5: Solve for x
   x = 3,774,172.30/2,146.01
6. Step 6: Final answer
   x = 1,758.69