Finding the Fourth Proportional to 14,128.72, 19,498.08 and 7,841.60

Step by Step Solution

1. Step 1: Write the proportion equation
   14,128.72 : 19,498.08 = 7,841.60 : x
2. Step 2: Convert to fraction form
   14,128.72/19,498.08 = 7,841.60/x
3. Step 3: Cross multiply
   14,128.72x = 19,498.08 × 7,841.60
4. Step 4: Simplify right side
   14,128.72x = 152,896,144.13
5. Step 5: Solve for x
   x = 152,896,144.13/14,128.72
6. Step 6: Final answer
   x = 10,821.66