Finding the Fourth Proportional to 1,667.52, 2,301.86 and 1,138.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.52 : 2,301.86 = 1,138.15 : x
2. Step 2: Convert to fraction form
   1,667.52/2,301.86 = 1,138.15/x
3. Step 3: Cross multiply
   1,667.52x = 2,301.86 × 1,138.15
4. Step 4: Simplify right side
   1,667.52x = 2,619,861.96
5. Step 5: Solve for x
   x = 2,619,861.96/1,667.52
6. Step 6: Final answer
   x = 1,571.11