Finding the Fourth Proportional to 1,870.04, 2,804.74 and 1,320.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.04 : 2,804.74 = 1,320.55 : x
2. Step 2: Convert to fraction form
   1,870.04/2,804.74 = 1,320.55/x
3. Step 3: Cross multiply
   1,870.04x = 2,804.74 × 1,320.55
4. Step 4: Simplify right side
   1,870.04x = 3,703,789.09
5. Step 5: Solve for x
   x = 3,703,789.09/1,870.04
6. Step 6: Final answer
   x = 1,980.60