Finding the Fourth Proportional to 2,090.73, 3,136.18 and 1,172.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,090.73 : 3,136.18 = 1,172.15 : x
2. Step 2: Convert to fraction form
   2,090.73/3,136.18 = 1,172.15/x
3. Step 3: Cross multiply
   2,090.73x = 3,136.18 × 1,172.15
4. Step 4: Simplify right side
   2,090.73x = 3,676,057.71
5. Step 5: Solve for x
   x = 3,676,057.71/2,090.73
6. Step 6: Final answer
   x = 1,758.27