Finding the Fourth Proportional to 10,699.16, 16,015.12 and 7,347.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,699.16 : 16,015.12 = 7,347.78 : x
2. Step 2: Convert to fraction form
   10,699.16/16,015.12 = 7,347.78/x
3. Step 3: Cross multiply
   10,699.16x = 16,015.12 × 7,347.78
4. Step 4: Simplify right side
   10,699.16x = 117,675,578.43
5. Step 5: Solve for x
   x = 117,675,578.43/10,699.16
6. Step 6: Final answer
   x = 10,998.58