Finding the Fourth Proportional to 2,802.38, 3,870.52 and 1,916.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,802.38 : 3,870.52 = 1,916.64 : x
2. Step 2: Convert to fraction form
   2,802.38/3,870.52 = 1,916.64/x
3. Step 3: Cross multiply
   2,802.38x = 3,870.52 × 1,916.64
4. Step 4: Simplify right side
   2,802.38x = 7,418,388.66
5. Step 5: Solve for x
   x = 7,418,388.66/2,802.38
6. Step 6: Final answer
   x = 2,647.18