Finding the Fourth Proportional to 7,870.29, 10,866.06 and 4,890.45

Step by Step Solution

1. Step 1: Write the proportion equation
   7,870.29 : 10,866.06 = 4,890.45 : x
2. Step 2: Convert to fraction form
   7,870.29/10,866.06 = 4,890.45/x
3. Step 3: Cross multiply
   7,870.29x = 10,866.06 × 4,890.45
4. Step 4: Simplify right side
   7,870.29x = 53,139,923.13
5. Step 5: Solve for x
   x = 53,139,923.13/7,870.29
6. Step 6: Final answer
   x = 6,751.97