Finding the Fourth Proportional to 1,111.56, 1,667.50 and 341.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.56 : 1,667.50 = 341.96 : x
2. Step 2: Convert to fraction form
   1,111.56/1,667.50 = 341.96/x
3. Step 3: Cross multiply
   1,111.56x = 1,667.50 × 341.96
4. Step 4: Simplify right side
   1,111.56x = 570,218.30
5. Step 5: Solve for x
   x = 570,218.30/1,111.56
6. Step 6: Final answer
   x = 512.99