Finding the Fourth Proportional to 2,098.81, 3,145.14 and 1,172.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,098.81 : 3,145.14 = 1,172.98 : x
2. Step 2: Convert to fraction form
   2,098.81/3,145.14 = 1,172.98/x
3. Step 3: Cross multiply
   2,098.81x = 3,145.14 × 1,172.98
4. Step 4: Simplify right side
   2,098.81x = 3,689,186.32
5. Step 5: Solve for x
   x = 3,689,186.32/2,098.81
6. Step 6: Final answer
   x = 1,757.75