Finding the Fourth Proportional to 22,409.46, 30,924.18 and 12,978.02

Step by Step Solution

1. Step 1: Write the proportion equation
   22,409.46 : 30,924.18 = 12,978.02 : x
2. Step 2: Convert to fraction form
   22,409.46/30,924.18 = 12,978.02/x
3. Step 3: Cross multiply
   22,409.46x = 30,924.18 × 12,978.02
4. Step 4: Simplify right side
   22,409.46x = 401,334,703.83
5. Step 5: Solve for x
   x = 401,334,703.83/22,409.46
6. Step 6: Final answer
   x = 17,909.16