Finding the Fourth Proportional to 1,870.12, 2,578.89 and 1,605.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.12 : 2,578.89 = 1,605.52 : x
2. Step 2: Convert to fraction form
   1,870.12/2,578.89 = 1,605.52/x
3. Step 3: Cross multiply
   1,870.12x = 2,578.89 × 1,605.52
4. Step 4: Simplify right side
   1,870.12x = 4,140,459.47
5. Step 5: Solve for x
   x = 4,140,459.47/1,870.12
6. Step 6: Final answer
   x = 2,214.01