Finding the Fourth Proportional to 42,884.78, 64,333.37 and 13,304.99

Step by Step Solution

1. Step 1: Write the proportion equation
   42,884.78 : 64,333.37 = 13,304.99 : x
2. Step 2: Convert to fraction form
   42,884.78/64,333.37 = 13,304.99/x
3. Step 3: Cross multiply
   42,884.78x = 64,333.37 × 13,304.99
4. Step 4: Simplify right side
   42,884.78x = 855,955,038.61
5. Step 5: Solve for x
   x = 855,955,038.61/42,884.78
6. Step 6: Final answer
   x = 19,959.42