Finding the Fourth Proportional to 7,345.57, 10,136.86 and 3,988.35

Step by Step Solution

1. Step 1: Write the proportion equation
   7,345.57 : 10,136.86 = 3,988.35 : x
2. Step 2: Convert to fraction form
   7,345.57/10,136.86 = 3,988.35/x
3. Step 3: Cross multiply
   7,345.57x = 10,136.86 × 3,988.35
4. Step 4: Simplify right side
   7,345.57x = 40,429,345.58
5. Step 5: Solve for x
   x = 40,429,345.58/7,345.57
6. Step 6: Final answer
   x = 5,503.91