Finding the Fourth Proportional to 1,575.72, 2,174.45 and 877.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,575.72 : 2,174.45 = 877.10 : x
2. Step 2: Convert to fraction form
   1,575.72/2,174.45 = 877.10/x
3. Step 3: Cross multiply
   1,575.72x = 2,174.45 × 877.10
4. Step 4: Simplify right side
   1,575.72x = 1,907,210.10
5. Step 5: Solve for x
   x = 1,907,210.10/1,575.72
6. Step 6: Final answer
   x = 1,210.37