Finding the Fourth Proportional to 7,345.10, 10,136.24 and 3,987.92

Step by Step Solution

1. Step 1: Write the proportion equation
   7,345.10 : 10,136.24 = 3,987.92 : x
2. Step 2: Convert to fraction form
   7,345.10/10,136.24 = 3,987.92/x
3. Step 3: Cross multiply
   7,345.10x = 10,136.24 × 3,987.92
4. Step 4: Simplify right side
   7,345.10x = 40,422,443.60
5. Step 5: Solve for x
   x = 40,422,443.60/7,345.10
6. Step 6: Final answer
   x = 5,503.32