Finding the Fourth Proportional to 22,128.60, 33,208.98 and 13,820.76

Step by Step Solution

1. Step 1: Write the proportion equation
   22,128.60 : 33,208.98 = 13,820.76 : x
2. Step 2: Convert to fraction form
   22,128.60/33,208.98 = 13,820.76/x
3. Step 3: Cross multiply
   22,128.60x = 33,208.98 × 13,820.76
4. Step 4: Simplify right side
   22,128.60x = 458,973,342.42
5. Step 5: Solve for x
   x = 458,973,342.42/22,128.60
6. Step 6: Final answer
   x = 20,741.18