Finding the Fourth Proportional to 13,026.88, 19,566.46 and 7,772.15

Step by Step Solution

1. Step 1: Write the proportion equation
   13,026.88 : 19,566.46 = 7,772.15 : x
2. Step 2: Convert to fraction form
   13,026.88/19,566.46 = 7,772.15/x
3. Step 3: Cross multiply
   13,026.88x = 19,566.46 × 7,772.15
4. Step 4: Simplify right side
   13,026.88x = 152,073,520.72
5. Step 5: Solve for x
   x = 152,073,520.72/13,026.88
6. Step 6: Final answer
   x = 11,673.83