Finding the Fourth Proportional to 1,667.32, 2,300.83 and 921.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.32 : 2,300.83 = 921.31 : x
2. Step 2: Convert to fraction form
   1,667.32/2,300.83 = 921.31/x
3. Step 3: Cross multiply
   1,667.32x = 2,300.83 × 921.31
4. Step 4: Simplify right side
   1,667.32x = 2,119,777.69
5. Step 5: Solve for x
   x = 2,119,777.69/1,667.32
6. Step 6: Final answer
   x = 1,271.37