Finding the Fourth Proportional to 10,128.85, 13,977.81 and 5,652.46

Step by Step Solution

1. Step 1: Write the proportion equation
   10,128.85 : 13,977.81 = 5,652.46 : x
2. Step 2: Convert to fraction form
   10,128.85/13,977.81 = 5,652.46/x
3. Step 3: Cross multiply
   10,128.85x = 13,977.81 × 5,652.46
4. Step 4: Simplify right side
   10,128.85x = 79,009,011.91
5. Step 5: Solve for x
   x = 79,009,011.91/10,128.85
6. Step 6: Final answer
   x = 7,800.39