Finding the Fourth Proportional to 9,326.61, 12,870.71 and 5,134.86

Step by Step Solution

1. Step 1: Write the proportion equation
   9,326.61 : 12,870.71 = 5,134.86 : x
2. Step 2: Convert to fraction form
   9,326.61/12,870.71 = 5,134.86/x
3. Step 3: Cross multiply
   9,326.61x = 12,870.71 × 5,134.86
4. Step 4: Simplify right side
   9,326.61x = 66,089,316.42
5. Step 5: Solve for x
   x = 66,089,316.42/9,326.61
6. Step 6: Final answer
   x = 7,086.10