Finding the Fourth Proportional to 9,109.34, 12,568.69 and 5,130.45

Step by Step Solution

1. Step 1: Write the proportion equation
   9,109.34 : 12,568.69 = 5,130.45 : x
2. Step 2: Convert to fraction form
   9,109.34/12,568.69 = 5,130.45/x
3. Step 3: Cross multiply
   9,109.34x = 12,568.69 × 5,130.45
4. Step 4: Simplify right side
   9,109.34x = 64,482,977.82
5. Step 5: Solve for x
   x = 64,482,977.82/9,109.34
6. Step 6: Final answer
   x = 7,078.78