Finding the Fourth Proportional to 7,139.89, 10,710.42 and 1,874.89

Step by Step Solution

1. Step 1: Write the proportion equation
   7,139.89 : 10,710.42 = 1,874.89 : x
2. Step 2: Convert to fraction form
   7,139.89/10,710.42 = 1,874.89/x
3. Step 3: Cross multiply
   7,139.89x = 10,710.42 × 1,874.89
4. Step 4: Simplify right side
   7,139.89x = 20,080,859.35
5. Step 5: Solve for x
   x = 20,080,859.35/7,139.89
6. Step 6: Final answer
   x = 2,812.49