Finding the Fourth Proportional to 1,003.39, 1,498.30 and 879.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.39 : 1,498.30 = 879.05 : x
2. Step 2: Convert to fraction form
   1,003.39/1,498.30 = 879.05/x
3. Step 3: Cross multiply
   1,003.39x = 1,498.30 × 879.05
4. Step 4: Simplify right side
   1,003.39x = 1,317,082.16
5. Step 5: Solve for x
   x = 1,317,082.16/1,003.39
6. Step 6: Final answer
   x = 1,312.64