Finding the Fourth Proportional to 22,880.43, 31,558.71 and 20,998.09

Step by Step Solution

1. Step 1: Write the proportion equation
   22,880.43 : 31,558.71 = 20,998.09 : x
2. Step 2: Convert to fraction form
   22,880.43/31,558.71 = 20,998.09/x
3. Step 3: Cross multiply
   22,880.43x = 31,558.71 × 20,998.09
4. Step 4: Simplify right side
   22,880.43x = 662,672,632.86
5. Step 5: Solve for x
   x = 662,672,632.86/22,880.43
6. Step 6: Final answer
   x = 28,962.42