Finding the Fourth Proportional to 14,146.34, 19,520.80 and 7,772.78

Step by Step Solution

1. Step 1: Write the proportion equation
   14,146.34 : 19,520.80 = 7,772.78 : x
2. Step 2: Convert to fraction form
   14,146.34/19,520.80 = 7,772.78/x
3. Step 3: Cross multiply
   14,146.34x = 19,520.80 × 7,772.78
4. Step 4: Simplify right side
   14,146.34x = 151,730,883.82
5. Step 5: Solve for x
   x = 151,730,883.82/14,146.34
6. Step 6: Final answer
   x = 10,725.80