Finding the Fourth Proportional to 13,120.83, 19,680.98 and 4,355.82

Step by Step Solution

1. Step 1: Write the proportion equation
   13,120.83 : 19,680.98 = 4,355.82 : x
2. Step 2: Convert to fraction form
   13,120.83/19,680.98 = 4,355.82/x
3. Step 3: Cross multiply
   13,120.83x = 19,680.98 × 4,355.82
4. Step 4: Simplify right side
   13,120.83x = 85,726,784.52
5. Step 5: Solve for x
   x = 85,726,784.52/13,120.83
6. Step 6: Final answer
   x = 6,533.64