Finding the Fourth Proportional to 1,667.17, 2,300.66 and 921.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.17 : 2,300.66 = 921.13 : x
2. Step 2: Convert to fraction form
   1,667.17/2,300.66 = 921.13/x
3. Step 3: Cross multiply
   1,667.17x = 2,300.66 × 921.13
4. Step 4: Simplify right side
   1,667.17x = 2,119,206.95
5. Step 5: Solve for x
   x = 2,119,206.95/1,667.17
6. Step 6: Final answer
   x = 1,271.14