Finding the Fourth Proportional to 5,438.34, 8,111.75 and 5,274.32

Step by Step Solution

1. Step 1: Write the proportion equation
   5,438.34 : 8,111.75 = 5,274.32 : x
2. Step 2: Convert to fraction form
   5,438.34/8,111.75 = 5,274.32/x
3. Step 3: Cross multiply
   5,438.34x = 8,111.75 × 5,274.32
4. Step 4: Simplify right side
   5,438.34x = 42,783,898.33
5. Step 5: Solve for x
   x = 42,783,898.33/5,438.34
6. Step 6: Final answer
   x = 7,867.09