Finding the Fourth Proportional to 1,111.96, 1,667.99 and 371.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.96 : 1,667.99 = 371.64 : x
2. Step 2: Convert to fraction form
   1,111.96/1,667.99 = 371.64/x
3. Step 3: Cross multiply
   1,111.96x = 1,667.99 × 371.64
4. Step 4: Simplify right side
   1,111.96x = 619,889.61
5. Step 5: Solve for x
   x = 619,889.61/1,111.96
6. Step 6: Final answer
   x = 557.47