Finding the Fourth Proportional to 7,300.50, 10,074.70 and 3,988.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,300.50 : 10,074.70 = 3,988.50 : x
2. Step 2: Convert to fraction form
   7,300.50/10,074.70 = 3,988.50/x
3. Step 3: Cross multiply
   7,300.50x = 10,074.70 × 3,988.50
4. Step 4: Simplify right side
   7,300.50x = 40,182,940.95
5. Step 5: Solve for x
   x = 40,182,940.95/7,300.50
6. Step 6: Final answer
   x = 5,504.14