Finding the Fourth Proportional to 1,111.02, 1,667.34 and 837.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.02 : 1,667.34 = 837.88 : x
2. Step 2: Convert to fraction form
   1,111.02/1,667.34 = 837.88/x
3. Step 3: Cross multiply
   1,111.02x = 1,667.34 × 837.88
4. Step 4: Simplify right side
   1,111.02x = 1,397,030.84
5. Step 5: Solve for x
   x = 1,397,030.84/1,111.02
6. Step 6: Final answer
   x = 1,257.43