Finding the Fourth Proportional to 10,671.09, 16,006.77 and 5,123.40

Step by Step Solution

1. Step 1: Write the proportion equation
   10,671.09 : 16,006.77 = 5,123.40 : x
2. Step 2: Convert to fraction form
   10,671.09/16,006.77 = 5,123.40/x
3. Step 3: Cross multiply
   10,671.09x = 16,006.77 × 5,123.40
4. Step 4: Simplify right side
   10,671.09x = 82,009,085.42
5. Step 5: Solve for x
   x = 82,009,085.42/10,671.09
6. Step 6: Final answer
   x = 7,685.16