Finding the Fourth Proportional to 10,386.90, 14,333.69 and 5,671.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,386.90 : 14,333.69 = 5,671.18 : x
2. Step 2: Convert to fraction form
   10,386.90/14,333.69 = 5,671.18/x
3. Step 3: Cross multiply
   10,386.90x = 14,333.69 × 5,671.18
4. Step 4: Simplify right side
   10,386.90x = 81,288,968.15
5. Step 5: Solve for x
   x = 81,288,968.15/10,386.90
6. Step 6: Final answer
   x = 7,826.10