Finding the Fourth Proportional to 1,575.88, 2,174.52 and 877.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,575.88 : 2,174.52 = 877.21 : x
2. Step 2: Convert to fraction form
   1,575.88/2,174.52 = 877.21/x
3. Step 3: Cross multiply
   1,575.88x = 2,174.52 × 877.21
4. Step 4: Simplify right side
   1,575.88x = 1,907,510.69
5. Step 5: Solve for x
   x = 1,907,510.69/1,575.88
6. Step 6: Final answer
   x = 1,210.44