Finding the Fourth Proportional to 10,138.79, 13,991.36 and 5,662.60

Step by Step Solution

1. Step 1: Write the proportion equation
   10,138.79 : 13,991.36 = 5,662.60 : x
2. Step 2: Convert to fraction form
   10,138.79/13,991.36 = 5,662.60/x
3. Step 3: Cross multiply
   10,138.79x = 13,991.36 × 5,662.60
4. Step 4: Simplify right side
   10,138.79x = 79,227,454.31
5. Step 5: Solve for x
   x = 79,227,454.31/10,138.79
6. Step 6: Final answer
   x = 7,814.29