Finding the Fourth Proportional to 6,649.02, 9,173.32 and 4,128.50

Step by Step Solution

1. Step 1: Write the proportion equation
   6,649.02 : 9,173.32 = 4,128.50 : x
2. Step 2: Convert to fraction form
   6,649.02/9,173.32 = 4,128.50/x
3. Step 3: Cross multiply
   6,649.02x = 9,173.32 × 4,128.50
4. Step 4: Simplify right side
   6,649.02x = 37,872,064.23
5. Step 5: Solve for x
   x = 37,872,064.23/6,649.02
6. Step 6: Final answer
   x = 5,695.89