Finding the Fourth Proportional to 9,130.69, 12,588.93 and 7,620.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,130.69 : 12,588.93 = 7,620.42 : x
2. Step 2: Convert to fraction form
   9,130.69/12,588.93 = 7,620.42/x
3. Step 3: Cross multiply
   9,130.69x = 12,588.93 × 7,620.42
4. Step 4: Simplify right side
   9,130.69x = 95,932,933.95
5. Step 5: Solve for x
   x = 95,932,933.95/9,130.69
6. Step 6: Final answer
   x = 10,506.65