Finding the Fourth Proportional to 10,386.78, 14,333.72 and 5,671.07

Step by Step Solution

1. Step 1: Write the proportion equation
   10,386.78 : 14,333.72 = 5,671.07 : x
2. Step 2: Convert to fraction form
   10,386.78/14,333.72 = 5,671.07/x
3. Step 3: Cross multiply
   10,386.78x = 14,333.72 × 5,671.07
4. Step 4: Simplify right side
   10,386.78x = 81,287,429.46
5. Step 5: Solve for x
   x = 81,287,429.46/10,386.78
6. Step 6: Final answer
   x = 7,826.05