Finding the Fourth Proportional to 1,588.39, 2,191.89 and 880.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,588.39 : 2,191.89 = 880.21 : x
2. Step 2: Convert to fraction form
   1,588.39/2,191.89 = 880.21/x
3. Step 3: Cross multiply
   1,588.39x = 2,191.89 × 880.21
4. Step 4: Simplify right side
   1,588.39x = 1,929,323.50
5. Step 5: Solve for x
   x = 1,929,323.50/1,588.39
6. Step 6: Final answer
   x = 1,214.64