Finding the Fourth Proportional to 1,159.91, 1,598.86 and 879.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,159.91 : 1,598.86 = 879.02 : x
2. Step 2: Convert to fraction form
   1,159.91/1,598.86 = 879.02/x
3. Step 3: Cross multiply
   1,159.91x = 1,598.86 × 879.02
4. Step 4: Simplify right side
   1,159.91x = 1,405,435.01
5. Step 5: Solve for x
   x = 1,405,435.01/1,159.91
6. Step 6: Final answer
   x = 1,211.67