Finding the Fourth Proportional to 1,116.18, 1,674.54 and 790.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116.18 : 1,674.54 = 790.56 : x
2. Step 2: Convert to fraction form
   1,116.18/1,674.54 = 790.56/x
3. Step 3: Cross multiply
   1,116.18x = 1,674.54 × 790.56
4. Step 4: Simplify right side
   1,116.18x = 1,323,824.34
5. Step 5: Solve for x
   x = 1,323,824.34/1,116.18
6. Step 6: Final answer
   x = 1,186.03