Finding the Fourth Proportional to 9,890.16, 14,834.82 and 2,870.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,890.16 : 14,834.82 = 2,870.16 : x
2. Step 2: Convert to fraction form
   9,890.16/14,834.82 = 2,870.16/x
3. Step 3: Cross multiply
   9,890.16x = 14,834.82 × 2,870.16
4. Step 4: Simplify right side
   9,890.16x = 42,578,306.97
5. Step 5: Solve for x
   x = 42,578,306.97/9,890.16
6. Step 6: Final answer
   x = 4,305.12