Finding the Fourth Proportional to 5,078.50, 7,009.29 and 2,870.50

Step by Step Solution

1. Step 1: Write the proportion equation
   5,078.50 : 7,009.29 = 2,870.50 : x
2. Step 2: Convert to fraction form
   5,078.50/7,009.29 = 2,870.50/x
3. Step 3: Cross multiply
   5,078.50x = 7,009.29 × 2,870.50
4. Step 4: Simplify right side
   5,078.50x = 20,120,166.95
5. Step 5: Solve for x
   x = 20,120,166.95/5,078.50
6. Step 6: Final answer
   x = 3,961.83