Finding the Fourth Proportional to 1,667.51, 2,301.33 and 1,247.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.51 : 2,301.33 = 1,247.13 : x
2. Step 2: Convert to fraction form
   1,667.51/2,301.33 = 1,247.13/x
3. Step 3: Cross multiply
   1,667.51x = 2,301.33 × 1,247.13
4. Step 4: Simplify right side
   1,667.51x = 2,870,057.68
5. Step 5: Solve for x
   x = 2,870,057.68/1,667.51
6. Step 6: Final answer
   x = 1,721.17