Finding the Fourth Proportional to 19,256.94, 28,883.42 and 13,056.78

Step by Step Solution

1. Step 1: Write the proportion equation
   19,256.94 : 28,883.42 = 13,056.78 : x
2. Step 2: Convert to fraction form
   19,256.94/28,883.42 = 13,056.78/x
3. Step 3: Cross multiply
   19,256.94x = 28,883.42 × 13,056.78
4. Step 4: Simplify right side
   19,256.94x = 377,124,395.30
5. Step 5: Solve for x
   x = 377,124,395.30/19,256.94
6. Step 6: Final answer
   x = 19,583.82