Finding the Fourth Proportional to 6,112.63, 8,429.17 and 5,438.31

Step by Step Solution

1. Step 1: Write the proportion equation
   6,112.63 : 8,429.17 = 5,438.31 : x
2. Step 2: Convert to fraction form
   6,112.63/8,429.17 = 5,438.31/x
3. Step 3: Cross multiply
   6,112.63x = 8,429.17 × 5,438.31
4. Step 4: Simplify right side
   6,112.63x = 45,840,439.50
5. Step 5: Solve for x
   x = 45,840,439.50/6,112.63
6. Step 6: Final answer
   x = 7,499.30