Finding the Fourth Proportional to 9,611.82, 13,264.16 and 5,420.07

Step by Step Solution

1. Step 1: Write the proportion equation
   9,611.82 : 13,264.16 = 5,420.07 : x
2. Step 2: Convert to fraction form
   9,611.82/13,264.16 = 5,420.07/x
3. Step 3: Cross multiply
   9,611.82x = 13,264.16 × 5,420.07
4. Step 4: Simplify right side
   9,611.82x = 71,892,648.59
5. Step 5: Solve for x
   x = 71,892,648.59/9,611.82
6. Step 6: Final answer
   x = 7,479.61