Finding the Fourth Proportional to 9,499.74, 13,108.47 and 5,307.90

Step by Step Solution

1. Step 1: Write the proportion equation
   9,499.74 : 13,108.47 = 5,307.90 : x
2. Step 2: Convert to fraction form
   9,499.74/13,108.47 = 5,307.90/x
3. Step 3: Cross multiply
   9,499.74x = 13,108.47 × 5,307.90
4. Step 4: Simplify right side
   9,499.74x = 69,578,447.91
5. Step 5: Solve for x
   x = 69,578,447.91/9,499.74
6. Step 6: Final answer
   x = 7,324.25