Finding the Fourth Proportional to 12,782.05, 17,645.60 and 9,904.33

Step by Step Solution

1. Step 1: Write the proportion equation
   12,782.05 : 17,645.60 = 9,904.33 : x
2. Step 2: Convert to fraction form
   12,782.05/17,645.60 = 9,904.33/x
3. Step 3: Cross multiply
   12,782.05x = 17,645.60 × 9,904.33
4. Step 4: Simplify right side
   12,782.05x = 174,767,737.30
5. Step 5: Solve for x
   x = 174,767,737.30/12,782.05
6. Step 6: Final answer
   x = 13,672.90