Finding the Fourth Proportional to 12,572.56, 17,334.12 and 7,855.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,572.56 : 17,334.12 = 7,855.12 : x
2. Step 2: Convert to fraction form
   12,572.56/17,334.12 = 7,855.12/x
3. Step 3: Cross multiply
   12,572.56x = 17,334.12 × 7,855.12
4. Step 4: Simplify right side
   12,572.56x = 136,161,592.69
5. Step 5: Solve for x
   x = 136,161,592.69/12,572.56
6. Step 6: Final answer
   x = 10,830.06