Finding the Fourth Proportional to 12,933.80, 17,850.60 and 7,900.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,933.80 : 17,850.60 = 7,900.96 : x
2. Step 2: Convert to fraction form
   12,933.80/17,850.60 = 7,900.96/x
3. Step 3: Cross multiply
   12,933.80x = 17,850.60 × 7,900.96
4. Step 4: Simplify right side
   12,933.80x = 141,036,876.58
5. Step 5: Solve for x
   x = 141,036,876.58/12,933.80
6. Step 6: Final answer
   x = 10,904.52