Finding the Fourth Proportional to 22,387.60, 30,895.72 and 12,316.48

Step by Step Solution

1. Step 1: Write the proportion equation
   22,387.60 : 30,895.72 = 12,316.48 : x
2. Step 2: Convert to fraction form
   22,387.60/30,895.72 = 12,316.48/x
3. Step 3: Cross multiply
   22,387.60x = 30,895.72 × 12,316.48
4. Step 4: Simplify right side
   22,387.60x = 380,526,517.47
5. Step 5: Solve for x
   x = 380,526,517.47/22,387.60
6. Step 6: Final answer
   x = 16,997.20