Finding the Fourth Proportional to 2,816.64, 3,884.82 and 1,870.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,816.64 : 3,884.82 = 1,870.74 : x
2. Step 2: Convert to fraction form
   2,816.64/3,884.82 = 1,870.74/x
3. Step 3: Cross multiply
   2,816.64x = 3,884.82 × 1,870.74
4. Step 4: Simplify right side
   2,816.64x = 7,267,488.17
5. Step 5: Solve for x
   x = 7,267,488.17/2,816.64
6. Step 6: Final answer
   x = 2,580.20