Finding the Fourth Proportional to 12,400.56, 17,100.72 and 9,416.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,400.56 : 17,100.72 = 9,416.52 : x
2. Step 2: Convert to fraction form
   12,400.56/17,100.72 = 9,416.52/x
3. Step 3: Cross multiply
   12,400.56x = 17,100.72 × 9,416.52
4. Step 4: Simplify right side
   12,400.56x = 161,029,271.89
5. Step 5: Solve for x
   x = 161,029,271.89/12,400.56
6. Step 6: Final answer
   x = 12,985.65