Finding the Fourth Proportional to 6,649.32, 9,931.89 and 5,173.10

Step by Step Solution

1. Step 1: Write the proportion equation
   6,649.32 : 9,931.89 = 5,173.10 : x
2. Step 2: Convert to fraction form
   6,649.32/9,931.89 = 5,173.10/x
3. Step 3: Cross multiply
   6,649.32x = 9,931.89 × 5,173.10
4. Step 4: Simplify right side
   6,649.32x = 51,378,584.63
5. Step 5: Solve for x
   x = 51,378,584.63/6,649.32
6. Step 6: Final answer
   x = 7,726.89