Finding the Fourth Proportional to 42,880.06, 64,326.31 and 13,300.27

Step by Step Solution

1. Step 1: Write the proportion equation
   42,880.06 : 64,326.31 = 13,300.27 : x
2. Step 2: Convert to fraction form
   42,880.06/64,326.31 = 13,300.27/x
3. Step 3: Cross multiply
   42,880.06x = 64,326.31 × 13,300.27
4. Step 4: Simplify right side
   42,880.06x = 855,557,291.10
5. Step 5: Solve for x
   x = 855,557,291.10/42,880.06
6. Step 6: Final answer
   x = 19,952.33