Finding the Fourth Proportional to 1,667.18, 2,301.54 and 1,138.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.18 : 2,301.54 = 1,138.82 : x
2. Step 2: Convert to fraction form
   1,667.18/2,301.54 = 1,138.82/x
3. Step 3: Cross multiply
   1,667.18x = 2,301.54 × 1,138.82
4. Step 4: Simplify right side
   1,667.18x = 2,621,039.78
5. Step 5: Solve for x
   x = 2,621,039.78/1,667.18
6. Step 6: Final answer
   x = 1,572.14