Finding the Fourth Proportional to 12,150.51, 16,770.83 and 7,912.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,150.51 : 16,770.83 = 7,912.15 : x
2. Step 2: Convert to fraction form
   12,150.51/16,770.83 = 7,912.15/x
3. Step 3: Cross multiply
   12,150.51x = 16,770.83 × 7,912.15
4. Step 4: Simplify right side
   12,150.51x = 132,693,199.17
5. Step 5: Solve for x
   x = 132,693,199.17/12,150.51
6. Step 6: Final answer
   x = 10,920.80