Finding the Fourth Proportional to 10,751.10, 16,122.55 and 5,127.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,751.10 : 16,122.55 = 5,127.78 : x
2. Step 2: Convert to fraction form
   10,751.10/16,122.55 = 5,127.78/x
3. Step 3: Cross multiply
   10,751.10x = 16,122.55 × 5,127.78
4. Step 4: Simplify right side
   10,751.10x = 82,672,783.19
5. Step 5: Solve for x
   x = 82,672,783.19/10,751.10
6. Step 6: Final answer
   x = 7,689.70