Finding the Fourth Proportional to 22,386.42, 30,891.51 and 12,953.16

Step by Step Solution

1. Step 1: Write the proportion equation
   22,386.42 : 30,891.51 = 12,953.16 : x
2. Step 2: Convert to fraction form
   22,386.42/30,891.51 = 12,953.16/x
3. Step 3: Cross multiply
   22,386.42x = 30,891.51 × 12,953.16
4. Step 4: Simplify right side
   22,386.42x = 400,142,671.67
5. Step 5: Solve for x
   x = 400,142,671.67/22,386.42
6. Step 6: Final answer
   x = 17,874.35