Finding the Fourth Proportional to 1,157.47, 1,595.36 and 877.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,157.47 : 1,595.36 = 877.61 : x
2. Step 2: Convert to fraction form
   1,157.47/1,595.36 = 877.61/x
3. Step 3: Cross multiply
   1,157.47x = 1,595.36 × 877.61
4. Step 4: Simplify right side
   1,157.47x = 1,400,103.89
5. Step 5: Solve for x
   x = 1,400,103.89/1,157.47
6. Step 6: Final answer
   x = 1,209.62