Finding the Fourth Proportional to 1,871.20, 2,807.61 and 1,004.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,871.20 : 2,807.61 = 1,004.50 : x
2. Step 2: Convert to fraction form
   1,871.20/2,807.61 = 1,004.50/x
3. Step 3: Cross multiply
   1,871.20x = 2,807.61 × 1,004.50
4. Step 4: Simplify right side
   1,871.20x = 2,820,244.25
5. Step 5: Solve for x
   x = 2,820,244.25/1,871.20
6. Step 6: Final answer
   x = 1,507.18