Finding the Fourth Proportional to 9,781.20, 13,498.17 and 5,304.99

Step by Step Solution

1. Step 1: Write the proportion equation
   9,781.20 : 13,498.17 = 5,304.99 : x
2. Step 2: Convert to fraction form
   9,781.20/13,498.17 = 5,304.99/x
3. Step 3: Cross multiply
   9,781.20x = 13,498.17 × 5,304.99
4. Step 4: Simplify right side
   9,781.20x = 71,607,656.87
5. Step 5: Solve for x
   x = 71,607,656.87/9,781.20
6. Step 6: Final answer
   x = 7,320.95