Finding the Fourth Proportional to 7,345.56, 10,136.83 and 3,988.34

Step by Step Solution

1. Step 1: Write the proportion equation
   7,345.56 : 10,136.83 = 3,988.34 : x
2. Step 2: Convert to fraction form
   7,345.56/10,136.83 = 3,988.34/x
3. Step 3: Cross multiply
   7,345.56x = 10,136.83 × 3,988.34
4. Step 4: Simplify right side
   7,345.56x = 40,429,124.56
5. Step 5: Solve for x
   x = 40,429,124.56/7,345.56
6. Step 6: Final answer
   x = 5,503.89