Finding the Fourth Proportional to 10,618.60, 14,614.98 and 9,351.37

Step by Step Solution

1. Step 1: Write the proportion equation
   10,618.60 : 14,614.98 = 9,351.37 : x
2. Step 2: Convert to fraction form
   10,618.60/14,614.98 = 9,351.37/x
3. Step 3: Cross multiply
   10,618.60x = 14,614.98 × 9,351.37
4. Step 4: Simplify right side
   10,618.60x = 136,670,085.52
5. Step 5: Solve for x
   x = 136,670,085.52/10,618.60
6. Step 6: Final answer
   x = 12,870.82