Finding the Fourth Proportional to 10,128.69, 13,977.89 and 5,652.35

Step by Step Solution

1. Step 1: Write the proportion equation
   10,128.69 : 13,977.89 = 5,652.35 : x
2. Step 2: Convert to fraction form
   10,128.69/13,977.89 = 5,652.35/x
3. Step 3: Cross multiply
   10,128.69x = 13,977.89 × 5,652.35
4. Step 4: Simplify right side
   10,128.69x = 79,007,828.39
5. Step 5: Solve for x
   x = 79,007,828.39/10,128.69
6. Step 6: Final answer
   x = 7,800.40