Finding the Fourth Proportional to 9,109.52, 12,570.66 and 5,130.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,109.52 : 12,570.66 = 5,130.50 : x
2. Step 2: Convert to fraction form
   9,109.52/12,570.66 = 5,130.50/x
3. Step 3: Cross multiply
   9,109.52x = 12,570.66 × 5,130.50
4. Step 4: Simplify right side
   9,109.52x = 64,493,771.13
5. Step 5: Solve for x
   x = 64,493,771.13/9,109.52
6. Step 6: Final answer
   x = 7,079.82