Finding the Fourth Proportional to 2,166.45, 2,990.69 and 1,270.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,166.45 : 2,990.69 = 1,270.06 : x
2. Step 2: Convert to fraction form
   2,166.45/2,990.69 = 1,270.06/x
3. Step 3: Cross multiply
   2,166.45x = 2,990.69 × 1,270.06
4. Step 4: Simplify right side
   2,166.45x = 3,798,355.74
5. Step 5: Solve for x
   x = 3,798,355.74/2,166.45
6. Step 6: Final answer
   x = 1,753.26