Finding the Fourth Proportional to 5,164.38, 7,128.70 and 3,068.50

Step by Step Solution

1. Step 1: Write the proportion equation
   5,164.38 : 7,128.70 = 3,068.50 : x
2. Step 2: Convert to fraction form
   5,164.38/7,128.70 = 3,068.50/x
3. Step 3: Cross multiply
   5,164.38x = 7,128.70 × 3,068.50
4. Step 4: Simplify right side
   5,164.38x = 21,874,415.95
5. Step 5: Solve for x
   x = 21,874,415.95/5,164.38
6. Step 6: Final answer
   x = 4,235.63