Finding the Fourth Proportional to 1,575.76, 2,174.52 and 877.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,575.76 : 2,174.52 = 877.12 : x
2. Step 2: Convert to fraction form
   1,575.76/2,174.52 = 877.12/x
3. Step 3: Cross multiply
   1,575.76x = 2,174.52 × 877.12
4. Step 4: Simplify right side
   1,575.76x = 1,907,314.98
5. Step 5: Solve for x
   x = 1,907,314.98/1,575.76
6. Step 6: Final answer
   x = 1,210.41