Finding the Fourth Proportional to 1,667.37, 2,301.17 and 1,387.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.37 : 2,301.17 = 1,387.11 : x
2. Step 2: Convert to fraction form
   1,667.37/2,301.17 = 1,387.11/x
3. Step 3: Cross multiply
   1,667.37x = 2,301.17 × 1,387.11
4. Step 4: Simplify right side
   1,667.37x = 3,191,975.92
5. Step 5: Solve for x
   x = 3,191,975.92/1,667.37
6. Step 6: Final answer
   x = 1,914.38