Finding the Fourth Proportional to 1,870.46, 2,805.72 and 1,325.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.46 : 2,805.72 = 1,325.60 : x
2. Step 2: Convert to fraction form
   1,870.46/2,805.72 = 1,325.60/x
3. Step 3: Cross multiply
   1,870.46x = 2,805.72 × 1,325.60
4. Step 4: Simplify right side
   1,870.46x = 3,719,262.43
5. Step 5: Solve for x
   x = 3,719,262.43/1,870.46
6. Step 6: Final answer
   x = 1,988.42