Finding the Fourth Proportional to 12,145.33, 16,771.53 and 7,677.01

Step by Step Solution

1. Step 1: Write the proportion equation
   12,145.33 : 16,771.53 = 7,677.01 : x
2. Step 2: Convert to fraction form
   12,145.33/16,771.53 = 7,677.01/x
3. Step 3: Cross multiply
   12,145.33x = 16,771.53 × 7,677.01
4. Step 4: Simplify right side
   12,145.33x = 128,755,203.53
5. Step 5: Solve for x
   x = 128,755,203.53/12,145.33
6. Step 6: Final answer
   x = 10,601.21