Finding the Fourth Proportional to 2,110.01, 3,169.58 and 1,288.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,110.01 : 3,169.58 = 1,288.78 : x
2. Step 2: Convert to fraction form
   2,110.01/3,169.58 = 1,288.78/x
3. Step 3: Cross multiply
   2,110.01x = 3,169.58 × 1,288.78
4. Step 4: Simplify right side
   2,110.01x = 4,084,876.94
5. Step 5: Solve for x
   x = 4,084,876.94/2,110.01
6. Step 6: Final answer
   x = 1,935.96