Finding the Fourth Proportional to 42,837.58, 64,258.17 and 13,255.98

Step by Step Solution

1. Step 1: Write the proportion equation
   42,837.58 : 64,258.17 = 13,255.98 : x
2. Step 2: Convert to fraction form
   42,837.58/64,258.17 = 13,255.98/x
3. Step 3: Cross multiply
   42,837.58x = 64,258.17 × 13,255.98
4. Step 4: Simplify right side
   42,837.58x = 851,805,016.36
5. Step 5: Solve for x
   x = 851,805,016.36/42,837.58
6. Step 6: Final answer
   x = 19,884.53