Finding the Fourth Proportional to 9,870.68, 14,806.16 and 5,515.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,870.68 : 14,806.16 = 5,515.88 : x
2. Step 2: Convert to fraction form
   9,870.68/14,806.16 = 5,515.88/x
3. Step 3: Cross multiply
   9,870.68x = 14,806.16 × 5,515.88
4. Step 4: Simplify right side
   9,870.68x = 81,669,001.82
5. Step 5: Solve for x
   x = 81,669,001.82/9,870.68
6. Step 6: Final answer
   x = 8,273.90