Finding the Fourth Proportional to 1,580.32, 2,180.58 and 881.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,580.32 : 2,180.58 = 881.72 : x
2. Step 2: Convert to fraction form
   1,580.32/2,180.58 = 881.72/x
3. Step 3: Cross multiply
   1,580.32x = 2,180.58 × 881.72
4. Step 4: Simplify right side
   1,580.32x = 1,922,661.00
5. Step 5: Solve for x
   x = 1,922,661.00/1,580.32
6. Step 6: Final answer
   x = 1,216.63