Finding the Fourth Proportional to 1,118.94, 1,667.17 and 1,056.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,118.94 : 1,667.17 = 1,056.06 : x
2. Step 2: Convert to fraction form
   1,118.94/1,667.17 = 1,056.06/x
3. Step 3: Cross multiply
   1,118.94x = 1,667.17 × 1,056.06
4. Step 4: Simplify right side
   1,118.94x = 1,760,630.44
5. Step 5: Solve for x
   x = 1,760,630.44/1,118.94
6. Step 6: Final answer
   x = 1,573.48