Finding the Fourth Proportional to 22,400.60, 30,907.86 and 12,963.69

Step by Step Solution

1. Step 1: Write the proportion equation
   22,400.60 : 30,907.86 = 12,963.69 : x
2. Step 2: Convert to fraction form
   22,400.60/30,907.86 = 12,963.69/x
3. Step 3: Cross multiply
   22,400.60x = 30,907.86 × 12,963.69
4. Step 4: Simplify right side
   22,400.60x = 400,679,956.03
5. Step 5: Solve for x
   x = 400,679,956.03/22,400.60
6. Step 6: Final answer
   x = 17,887.02