Finding the Fourth Proportional to 5,109.35, 7,050.33 and 2,870.70

Step by Step Solution

1. Step 1: Write the proportion equation
   5,109.35 : 7,050.33 = 2,870.70 : x
2. Step 2: Convert to fraction form
   5,109.35/7,050.33 = 2,870.70/x
3. Step 3: Cross multiply
   5,109.35x = 7,050.33 × 2,870.70
4. Step 4: Simplify right side
   5,109.35x = 20,239,382.33
5. Step 5: Solve for x
   x = 20,239,382.33/5,109.35
6. Step 6: Final answer
   x = 3,961.25