Finding the Fourth Proportional to 2,164.86, 2,988.63 and 1,326.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,164.86 : 2,988.63 = 1,326.78 : x
2. Step 2: Convert to fraction form
   2,164.86/2,988.63 = 1,326.78/x
3. Step 3: Cross multiply
   2,164.86x = 2,988.63 × 1,326.78
4. Step 4: Simplify right side
   2,164.86x = 3,965,254.51
5. Step 5: Solve for x
   x = 3,965,254.51/2,164.86
6. Step 6: Final answer
   x = 1,831.64