Finding the Fourth Proportional to 9,109.58, 12,571.94 and 5,130.45

Step by Step Solution

1. Step 1: Write the proportion equation
   9,109.58 : 12,571.94 = 5,130.45 : x
2. Step 2: Convert to fraction form
   9,109.58/12,571.94 = 5,130.45/x
3. Step 3: Cross multiply
   9,109.58x = 12,571.94 × 5,130.45
4. Step 4: Simplify right side
   9,109.58x = 64,499,722.40
5. Step 5: Solve for x
   x = 64,499,722.40/9,109.58
6. Step 6: Final answer
   x = 7,080.43