Finding the Fourth Proportional to 43,331.82, 64,978.26 and 19,945.50

Step by Step Solution

1. Step 1: Write the proportion equation
   43,331.82 : 64,978.26 = 19,945.50 : x
2. Step 2: Convert to fraction form
   43,331.82/64,978.26 = 19,945.50/x
3. Step 3: Cross multiply
   43,331.82x = 64,978.26 × 19,945.50
4. Step 4: Simplify right side
   43,331.82x = 1,296,023,884.83
5. Step 5: Solve for x
   x = 1,296,023,884.83/43,331.82
6. Step 6: Final answer
   x = 29,909.29