Finding the Fourth Proportional to 9,092.82, 12,570.64 and 9,009.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,092.82 : 12,570.64 = 9,009.78 : x
2. Step 2: Convert to fraction form
   9,092.82/12,570.64 = 9,009.78/x
3. Step 3: Cross multiply
   9,092.82x = 12,570.64 × 9,009.78
4. Step 4: Simplify right side
   9,092.82x = 113,258,700.86
5. Step 5: Solve for x
   x = 113,258,700.86/9,092.82
6. Step 6: Final answer
   x = 12,455.84