Finding the Fourth Proportional to 2,602.82, 3,904.27 and 871.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,602.82 : 3,904.27 = 871.45 : x
2. Step 2: Convert to fraction form
   2,602.82/3,904.27 = 871.45/x
3. Step 3: Cross multiply
   2,602.82x = 3,904.27 × 871.45
4. Step 4: Simplify right side
   2,602.82x = 3,402,364.15
5. Step 5: Solve for x
   x = 3,402,364.15/2,602.82
6. Step 6: Final answer
   x = 1,307.18