Finding the Fourth Proportional to 7,718.98, 10,643.58 and 5,590.30

Step by Step Solution

1. Step 1: Write the proportion equation
   7,718.98 : 10,643.58 = 5,590.30 : x
2. Step 2: Convert to fraction form
   7,718.98/10,643.58 = 5,590.30/x
3. Step 3: Cross multiply
   7,718.98x = 10,643.58 × 5,590.30
4. Step 4: Simplify right side
   7,718.98x = 59,500,805.27
5. Step 5: Solve for x
   x = 59,500,805.27/7,718.98
6. Step 6: Final answer
   x = 7,708.38