Finding the Fourth Proportional to 9,415.37, 12,992.76 and 5,166.33

Step by Step Solution

1. Step 1: Write the proportion equation
   9,415.37 : 12,992.76 = 5,166.33 : x
2. Step 2: Convert to fraction form
   9,415.37/12,992.76 = 5,166.33/x
3. Step 3: Cross multiply
   9,415.37x = 12,992.76 × 5,166.33
4. Step 4: Simplify right side
   9,415.37x = 67,124,885.77
5. Step 5: Solve for x
   x = 67,124,885.77/9,415.37
6. Step 6: Final answer
   x = 7,129.29