Finding the Fourth Proportional to 12,877.47, 19,359.27 and 10,277.64

Step by Step Solution

1. Step 1: Write the proportion equation
   12,877.47 : 19,359.27 = 10,277.64 : x
2. Step 2: Convert to fraction form
   12,877.47/19,359.27 = 10,277.64/x
3. Step 3: Cross multiply
   12,877.47x = 19,359.27 × 10,277.64
4. Step 4: Simplify right side
   12,877.47x = 198,967,607.72
5. Step 5: Solve for x
   x = 198,967,607.72/12,877.47
6. Step 6: Final answer
   x = 15,450.83