Finding the Fourth Proportional to 2,351.13, 3,524.59 and 891.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,351.13 : 3,524.59 = 891.31 : x
2. Step 2: Convert to fraction form
   2,351.13/3,524.59 = 891.31/x
3. Step 3: Cross multiply
   2,351.13x = 3,524.59 × 891.31
4. Step 4: Simplify right side
   2,351.13x = 3,141,502.31
5. Step 5: Solve for x
   x = 3,141,502.31/2,351.13
6. Step 6: Final answer
   x = 1,336.17