Finding the Fourth Proportional to 8,715.58, 12,027.72 and 5,130.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,715.58 : 12,027.72 = 5,130.72 : x
2. Step 2: Convert to fraction form
   8,715.58/12,027.72 = 5,130.72/x
3. Step 3: Cross multiply
   8,715.58x = 12,027.72 × 5,130.72
4. Step 4: Simplify right side
   8,715.58x = 61,710,882.80
5. Step 5: Solve for x
   x = 61,710,882.80/8,715.58
6. Step 6: Final answer
   x = 7,080.53