Finding the Fourth Proportional to 9,386.61, 12,950.19 and 5,607.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,386.61 : 12,950.19 = 5,607.15 : x
2. Step 2: Convert to fraction form
   9,386.61/12,950.19 = 5,607.15/x
3. Step 3: Cross multiply
   9,386.61x = 12,950.19 × 5,607.15
4. Step 4: Simplify right side
   9,386.61x = 72,613,657.86
5. Step 5: Solve for x
   x = 72,613,657.86/9,386.61
6. Step 6: Final answer
   x = 7,735.88