Finding the Fourth Proportional to 5,426.90, 7,488.98 and 3,188.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,426.90 : 7,488.98 = 3,188.72 : x
2. Step 2: Convert to fraction form
   5,426.90/7,488.98 = 3,188.72/x
3. Step 3: Cross multiply
   5,426.90x = 7,488.98 × 3,188.72
4. Step 4: Simplify right side
   5,426.90x = 23,880,260.31
5. Step 5: Solve for x
   x = 23,880,260.31/5,426.90
6. Step 6: Final answer
   x = 4,400.35