Finding the Fourth Proportional to 1,111.93, 1,667.71 and 342.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.93 : 1,667.71 = 342.25 : x
2. Step 2: Convert to fraction form
   1,111.93/1,667.71 = 342.25/x
3. Step 3: Cross multiply
   1,111.93x = 1,667.71 × 342.25
4. Step 4: Simplify right side
   1,111.93x = 570,773.75
5. Step 5: Solve for x
   x = 570,773.75/1,111.93
6. Step 6: Final answer
   x = 513.32