Finding the Fourth Proportional to 13,294.50, 19,784.79 and 12,851.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,294.50 : 19,784.79 = 12,851.56 : x
2. Step 2: Convert to fraction form
   13,294.50/19,784.79 = 12,851.56/x
3. Step 3: Cross multiply
   13,294.50x = 19,784.79 × 12,851.56
4. Step 4: Simplify right side
   13,294.50x = 254,265,415.77
5. Step 5: Solve for x
   x = 254,265,415.77/13,294.50
6. Step 6: Final answer
   x = 19,125.61