Finding the Fourth Proportional to 1,142.96, 1,716.06 and 1,090.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,142.96 : 1,716.06 = 1,090.76 : x
2. Step 2: Convert to fraction form
   1,142.96/1,716.06 = 1,090.76/x
3. Step 3: Cross multiply
   1,142.96x = 1,716.06 × 1,090.76
4. Step 4: Simplify right side
   1,142.96x = 1,871,809.61
5. Step 5: Solve for x
   x = 1,871,809.61/1,142.96
6. Step 6: Final answer
   x = 1,637.69