Finding the Fourth Proportional to 9,781.34, 13,498.21 and 5,305.08

Step by Step Solution

1. Step 1: Write the proportion equation
   9,781.34 : 13,498.21 = 5,305.08 : x
2. Step 2: Convert to fraction form
   9,781.34/13,498.21 = 5,305.08/x
3. Step 3: Cross multiply
   9,781.34x = 13,498.21 × 5,305.08
4. Step 4: Simplify right side
   9,781.34x = 71,609,083.91
5. Step 5: Solve for x
   x = 71,609,083.91/9,781.34
6. Step 6: Final answer
   x = 7,320.99