Finding the Fourth Proportional to 1,870.56, 2,799.72 and 1,690.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.56 : 2,799.72 = 1,690.92 : x
2. Step 2: Convert to fraction form
   1,870.56/2,799.72 = 1,690.92/x
3. Step 3: Cross multiply
   1,870.56x = 2,799.72 × 1,690.92
4. Step 4: Simplify right side
   1,870.56x = 4,734,102.54
5. Step 5: Solve for x
   x = 4,734,102.54/1,870.56
6. Step 6: Final answer
   x = 2,530.85