Finding the Fourth Proportional to 12,158.51, 16,782.39 and 7,123.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,158.51 : 16,782.39 = 7,123.82 : x
2. Step 2: Convert to fraction form
   12,158.51/16,782.39 = 7,123.82/x
3. Step 3: Cross multiply
   12,158.51x = 16,782.39 × 7,123.82
4. Step 4: Simplify right side
   12,158.51x = 119,554,641.62
5. Step 5: Solve for x
   x = 119,554,641.62/12,158.51
6. Step 6: Final answer
   x = 9,833.01