Finding the Fourth Proportional to 10,799.68, 16,185.75 and 4,870.21

Step by Step Solution

1. Step 1: Write the proportion equation
   10,799.68 : 16,185.75 = 4,870.21 : x
2. Step 2: Convert to fraction form
   10,799.68/16,185.75 = 4,870.21/x
3. Step 3: Cross multiply
   10,799.68x = 16,185.75 × 4,870.21
4. Step 4: Simplify right side
   10,799.68x = 78,828,001.51
5. Step 5: Solve for x
   x = 78,828,001.51/10,799.68
6. Step 6: Final answer
   x = 7,299.11