Finding the Fourth Proportional to 3,807.82, 5,259.96 and 2,870.74

Step by Step Solution

1. Step 1: Write the proportion equation
   3,807.82 : 5,259.96 = 2,870.74 : x
2. Step 2: Convert to fraction form
   3,807.82/5,259.96 = 2,870.74/x
3. Step 3: Cross multiply
   3,807.82x = 5,259.96 × 2,870.74
4. Step 4: Simplify right side
   3,807.82x = 15,099,977.57
5. Step 5: Solve for x
   x = 15,099,977.57/3,807.82
6. Step 6: Final answer
   x = 3,965.52