Finding the Fourth Proportional to 2,131.82, 3,198.51 and 899.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.82 : 3,198.51 = 899.12 : x
2. Step 2: Convert to fraction form
   2,131.82/3,198.51 = 899.12/x
3. Step 3: Cross multiply
   2,131.82x = 3,198.51 × 899.12
4. Step 4: Simplify right side
   2,131.82x = 2,875,844.31
5. Step 5: Solve for x
   x = 2,875,844.31/2,131.82
6. Step 6: Final answer
   x = 1,349.01