Finding the Fourth Proportional to 12,912.51, 17,818.68 and 7,875.93

Step by Step Solution

1. Step 1: Write the proportion equation
   12,912.51 : 17,818.68 = 7,875.93 : x
2. Step 2: Convert to fraction form
   12,912.51/17,818.68 = 7,875.93/x
3. Step 3: Cross multiply
   12,912.51x = 17,818.68 × 7,875.93
4. Step 4: Simplify right side
   12,912.51x = 140,338,676.37
5. Step 5: Solve for x
   x = 140,338,676.37/12,912.51
6. Step 6: Final answer
   x = 10,868.43