Finding the Fourth Proportional to 1,870.74, 2,580.30 and 1,208.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.74 : 2,580.30 = 1,208.52 : x
2. Step 2: Convert to fraction form
   1,870.74/2,580.30 = 1,208.52/x
3. Step 3: Cross multiply
   1,870.74x = 2,580.30 × 1,208.52
4. Step 4: Simplify right side
   1,870.74x = 3,118,344.16
5. Step 5: Solve for x
   x = 3,118,344.16/1,870.74
6. Step 6: Final answer
   x = 1,666.90