Finding the Fourth Proportional to 1,870.08, 2,800.96 and 1,291.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.08 : 2,800.96 = 1,291.20 : x
2. Step 2: Convert to fraction form
   1,870.08/2,800.96 = 1,291.20/x
3. Step 3: Cross multiply
   1,870.08x = 2,800.96 × 1,291.20
4. Step 4: Simplify right side
   1,870.08x = 3,616,599.55
5. Step 5: Solve for x
   x = 3,616,599.55/1,870.08
6. Step 6: Final answer
   x = 1,933.93