Finding the Fourth Proportional to 6,111.63, 8,427.79 and 5,437.31

Step by Step Solution

1. Step 1: Write the proportion equation
   6,111.63 : 8,427.79 = 5,437.31 : x
2. Step 2: Convert to fraction form
   6,111.63/8,427.79 = 5,437.31/x
3. Step 3: Cross multiply
   6,111.63x = 8,427.79 × 5,437.31
4. Step 4: Simplify right side
   6,111.63x = 45,824,506.84
5. Step 5: Solve for x
   x = 45,824,506.84/6,111.63
6. Step 6: Final answer
   x = 7,497.92