Finding the Fourth Proportional to 13,209.83, 19,817.34 and 4,889.91

Step by Step Solution

1. Step 1: Write the proportion equation
   13,209.83 : 19,817.34 = 4,889.91 : x
2. Step 2: Convert to fraction form
   13,209.83/19,817.34 = 4,889.91/x
3. Step 3: Cross multiply
   13,209.83x = 19,817.34 × 4,889.91
4. Step 4: Simplify right side
   13,209.83x = 96,904,984.59
5. Step 5: Solve for x
   x = 96,904,984.59/13,209.83
6. Step 6: Final answer
   x = 7,335.82