Finding the Fourth Proportional to 1,112.30, 1,667.56 and 556.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,112.30 : 1,667.56 = 556.72 : x
2. Step 2: Convert to fraction form
   1,112.30/1,667.56 = 556.72/x
3. Step 3: Cross multiply
   1,112.30x = 1,667.56 × 556.72
4. Step 4: Simplify right side
   1,112.30x = 928,364.00
5. Step 5: Solve for x
   x = 928,364.00/1,112.30
6. Step 6: Final answer
   x = 834.63