Finding the Fourth Proportional to 9,156.71, 12,634.74 and 5,379.59

Step by Step Solution

1. Step 1: Write the proportion equation
   9,156.71 : 12,634.74 = 5,379.59 : x
2. Step 2: Convert to fraction form
   9,156.71/12,634.74 = 5,379.59/x
3. Step 3: Cross multiply
   9,156.71x = 12,634.74 × 5,379.59
4. Step 4: Simplify right side
   9,156.71x = 67,969,657.78
5. Step 5: Solve for x
   x = 67,969,657.78/9,156.71
6. Step 6: Final answer
   x = 7,422.94