Finding the Fourth Proportional to 19,460.13, 29,146.41 and 13,642.71

Step by Step Solution

1. Step 1: Write the proportion equation
   19,460.13 : 29,146.41 = 13,642.71 : x
2. Step 2: Convert to fraction form
   19,460.13/29,146.41 = 13,642.71/x
3. Step 3: Cross multiply
   19,460.13x = 29,146.41 × 13,642.71
4. Step 4: Simplify right side
   19,460.13x = 397,636,019.17
5. Step 5: Solve for x
   x = 397,636,019.17/19,460.13
6. Step 6: Final answer
   x = 20,433.37