Finding the Fourth Proportional to 22,331.78, 33,328.06 and 21,427.59

Step by Step Solution

1. Step 1: Write the proportion equation
   22,331.78 : 33,328.06 = 21,427.59 : x
2. Step 2: Convert to fraction form
   22,331.78/33,328.06 = 21,427.59/x
3. Step 3: Cross multiply
   22,331.78x = 33,328.06 × 21,427.59
4. Step 4: Simplify right side
   22,331.78x = 714,139,889.12
5. Step 5: Solve for x
   x = 714,139,889.12/22,331.78
6. Step 6: Final answer
   x = 31,978.64