Finding the Fourth Proportional to 1,667.18, 2,499.54 and 1,009.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.18 : 2,499.54 = 1,009.31 : x
2. Step 2: Convert to fraction form
   1,667.18/2,499.54 = 1,009.31/x
3. Step 3: Cross multiply
   1,667.18x = 2,499.54 × 1,009.31
4. Step 4: Simplify right side
   1,667.18x = 2,522,810.72
5. Step 5: Solve for x
   x = 2,522,810.72/1,667.18
6. Step 6: Final answer
   x = 1,513.22