Finding the Fourth Proportional to 2,146.01, 2,961.99 and 1,398.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,146.01 : 2,961.99 = 1,398.65 : x
2. Step 2: Convert to fraction form
   2,146.01/2,961.99 = 1,398.65/x
3. Step 3: Cross multiply
   2,146.01x = 2,961.99 × 1,398.65
4. Step 4: Simplify right side
   2,146.01x = 4,142,780.32
5. Step 5: Solve for x
   x = 4,142,780.32/2,146.01
6. Step 6: Final answer
   x = 1,930.46