Finding the Fourth Proportional to 14,321.54, 19,763.80 and 7,947.72

Step by Step Solution

1. Step 1: Write the proportion equation
   14,321.54 : 19,763.80 = 7,947.72 : x
2. Step 2: Convert to fraction form
   14,321.54/19,763.80 = 7,947.72/x
3. Step 3: Cross multiply
   14,321.54x = 19,763.80 × 7,947.72
4. Step 4: Simplify right side
   14,321.54x = 157,077,128.67
5. Step 5: Solve for x
   x = 157,077,128.67/14,321.54
6. Step 6: Final answer
   x = 10,967.89