Finding the Fourth Proportional to 7,345.31, 10,136.52 and 3,988.10

Step by Step Solution

1. Step 1: Write the proportion equation
   7,345.31 : 10,136.52 = 3,988.10 : x
2. Step 2: Convert to fraction form
   7,345.31/10,136.52 = 3,988.10/x
3. Step 3: Cross multiply
   7,345.31x = 10,136.52 × 3,988.10
4. Step 4: Simplify right side
   7,345.31x = 40,425,480.75
5. Step 5: Solve for x
   x = 40,425,480.75/7,345.31
6. Step 6: Final answer
   x = 5,503.58