Finding the Fourth Proportional to 1,909.83, 2,865.59 and 1,216.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,909.83 : 2,865.59 = 1,216.32 : x
2. Step 2: Convert to fraction form
   1,909.83/2,865.59 = 1,216.32/x
3. Step 3: Cross multiply
   1,909.83x = 2,865.59 × 1,216.32
4. Step 4: Simplify right side
   1,909.83x = 3,485,457.06
5. Step 5: Solve for x
   x = 3,485,457.06/1,909.83
6. Step 6: Final answer
   x = 1,825.01