Finding the Fourth Proportional to 10,699.47, 16,057.07 and 5,077.15

Step by Step Solution

1. Step 1: Write the proportion equation
   10,699.47 : 16,057.07 = 5,077.15 : x
2. Step 2: Convert to fraction form
   10,699.47/16,057.07 = 5,077.15/x
3. Step 3: Cross multiply
   10,699.47x = 16,057.07 × 5,077.15
4. Step 4: Simplify right side
   10,699.47x = 81,524,152.95
5. Step 5: Solve for x
   x = 81,524,152.95/10,699.47
6. Step 6: Final answer
   x = 7,619.46