Finding the Fourth Proportional to 43,341.30, 64,965.15 and 21,105.54

Step by Step Solution

1. Step 1: Write the proportion equation
   43,341.30 : 64,965.15 = 21,105.54 : x
2. Step 2: Convert to fraction form
   43,341.30/64,965.15 = 21,105.54/x
3. Step 3: Cross multiply
   43,341.30x = 64,965.15 × 21,105.54
4. Step 4: Simplify right side
   43,341.30x = 1,371,124,571.93
5. Step 5: Solve for x
   x = 1,371,124,571.93/43,341.30
6. Step 6: Final answer
   x = 31,635.52