Finding the Fourth Proportional to 1,111.42, 1,667.49 and 534.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.42 : 1,667.49 = 534.34 : x
2. Step 2: Convert to fraction form
   1,111.42/1,667.49 = 534.34/x
3. Step 3: Cross multiply
   1,111.42x = 1,667.49 × 534.34
4. Step 4: Simplify right side
   1,111.42x = 891,006.61
5. Step 5: Solve for x
   x = 891,006.61/1,111.42
6. Step 6: Final answer
   x = 801.68