Finding the Fourth Proportional to 1,971.86, 2,722.23 and 1,309.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,971.86 : 2,722.23 = 1,309.59 : x
2. Step 2: Convert to fraction form
   1,971.86/2,722.23 = 1,309.59/x
3. Step 3: Cross multiply
   1,971.86x = 2,722.23 × 1,309.59
4. Step 4: Simplify right side
   1,971.86x = 3,565,005.19
5. Step 5: Solve for x
   x = 3,565,005.19/1,971.86
6. Step 6: Final answer
   x = 1,807.94