Finding the Fourth Proportional to 5,118.61, 7,056.16 and 3,621.91

Step by Step Solution

1. Step 1: Write the proportion equation
   5,118.61 : 7,056.16 = 3,621.91 : x
2. Step 2: Convert to fraction form
   5,118.61/7,056.16 = 3,621.91/x
3. Step 3: Cross multiply
   5,118.61x = 7,056.16 × 3,621.91
4. Step 4: Simplify right side
   5,118.61x = 25,556,776.47
5. Step 5: Solve for x
   x = 25,556,776.47/5,118.61
6. Step 6: Final answer
   x = 4,992.91