Finding the Fourth Proportional to 42,721.49, 64,081.83 and 14,260.58

Step by Step Solution

1. Step 1: Write the proportion equation
   42,721.49 : 64,081.83 = 14,260.58 : x
2. Step 2: Convert to fraction form
   42,721.49/64,081.83 = 14,260.58/x
3. Step 3: Cross multiply
   42,721.49x = 64,081.83 × 14,260.58
4. Step 4: Simplify right side
   42,721.49x = 913,843,742.85
5. Step 5: Solve for x
   x = 913,843,742.85/42,721.49
6. Step 6: Final answer
   x = 21,390.73