Finding the Fourth Proportional to 1,575.45, 2,173.77 and 876.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,575.45 : 2,173.77 = 876.83 : x
2. Step 2: Convert to fraction form
   1,575.45/2,173.77 = 876.83/x
3. Step 3: Cross multiply
   1,575.45x = 2,173.77 × 876.83
4. Step 4: Simplify right side
   1,575.45x = 1,906,015.88
5. Step 5: Solve for x
   x = 1,906,015.88/1,575.45
6. Step 6: Final answer
   x = 1,209.82