Finding the Fourth Proportional to 10,899.04, 15,019.68 and 7,911.76

Step by Step Solution

1. Step 1: Write the proportion equation
   10,899.04 : 15,019.68 = 7,911.76 : x
2. Step 2: Convert to fraction form
   10,899.04/15,019.68 = 7,911.76/x
3. Step 3: Cross multiply
   10,899.04x = 15,019.68 × 7,911.76
4. Step 4: Simplify right side
   10,899.04x = 118,832,103.44
5. Step 5: Solve for x
   x = 118,832,103.44/10,899.04
6. Step 6: Final answer
   x = 10,902.99