Finding the Fourth Proportional to 42,162.69, 63,238.55 and 19,990.16

Step by Step Solution

1. Step 1: Write the proportion equation
   42,162.69 : 63,238.55 = 19,990.16 : x
2. Step 2: Convert to fraction form
   42,162.69/63,238.55 = 19,990.16/x
3. Step 3: Cross multiply
   42,162.69x = 63,238.55 × 19,990.16
4. Step 4: Simplify right side
   42,162.69x = 1,264,148,545.50
5. Step 5: Solve for x
   x = 1,264,148,545.50/42,162.69
6. Step 6: Final answer
   x = 29,982.63