Finding the Fourth Proportional to 8,224.32, 11,345.72 and 5,390.94

Step by Step Solution

1. Step 1: Write the proportion equation
   8,224.32 : 11,345.72 = 5,390.94 : x
2. Step 2: Convert to fraction form
   8,224.32/11,345.72 = 5,390.94/x
3. Step 3: Cross multiply
   8,224.32x = 11,345.72 × 5,390.94
4. Step 4: Simplify right side
   8,224.32x = 61,164,068.82
5. Step 5: Solve for x
   x = 61,164,068.82/8,224.32
6. Step 6: Final answer
   x = 7,436.98