Finding the Fourth Proportional to 1,116.02, 1,674.79 and 385.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116.02 : 1,674.79 = 385.59 : x
2. Step 2: Convert to fraction form
   1,116.02/1,674.79 = 385.59/x
3. Step 3: Cross multiply
   1,116.02x = 1,674.79 × 385.59
4. Step 4: Simplify right side
   1,116.02x = 645,786.46
5. Step 5: Solve for x
   x = 645,786.46/1,116.02
6. Step 6: Final answer
   x = 578.65