Finding the Fourth Proportional to 7,485.67, 10,330.23 and 4,128.70

Step by Step Solution

1. Step 1: Write the proportion equation
   7,485.67 : 10,330.23 = 4,128.70 : x
2. Step 2: Convert to fraction form
   7,485.67/10,330.23 = 4,128.70/x
3. Step 3: Cross multiply
   7,485.67x = 10,330.23 × 4,128.70
4. Step 4: Simplify right side
   7,485.67x = 42,650,420.60
5. Step 5: Solve for x
   x = 42,650,420.60/7,485.67
6. Step 6: Final answer
   x = 5,697.61