Finding the Fourth Proportional to 12,171.77, 18,259.53 and 5,151.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,171.77 : 18,259.53 = 5,151.82 : x
2. Step 2: Convert to fraction form
   12,171.77/18,259.53 = 5,151.82/x
3. Step 3: Cross multiply
   12,171.77x = 18,259.53 × 5,151.82
4. Step 4: Simplify right side
   12,171.77x = 94,069,811.84
5. Step 5: Solve for x
   x = 94,069,811.84/12,171.77
6. Step 6: Final answer
   x = 7,728.52