Finding the Fourth Proportional to 42,619.05, 63,926.28 and 13,036.89

Step by Step Solution

1. Step 1: Write the proportion equation
   42,619.05 : 63,926.28 = 13,036.89 : x
2. Step 2: Convert to fraction form
   42,619.05/63,926.28 = 13,036.89/x
3. Step 3: Cross multiply
   42,619.05x = 63,926.28 × 13,036.89
4. Step 4: Simplify right side
   42,619.05x = 833,399,880.47
5. Step 5: Solve for x
   x = 833,399,880.47/42,619.05
6. Step 6: Final answer
   x = 19,554.63