Finding the Fourth Proportional to 42,923.76, 64,389.82 and 13,333.64

Step by Step Solution

1. Step 1: Write the proportion equation
   42,923.76 : 64,389.82 = 13,333.64 : x
2. Step 2: Convert to fraction form
   42,923.76/64,389.82 = 13,333.64/x
3. Step 3: Cross multiply
   42,923.76x = 64,389.82 × 13,333.64
4. Step 4: Simplify right side
   42,923.76x = 858,550,679.54
5. Step 5: Solve for x
   x = 858,550,679.54/42,923.76
6. Step 6: Final answer
   x = 20,001.76