Finding the Fourth Proportional to 42,488.89, 63,693.47 and 14,389.27

Step by Step Solution

1. Step 1: Write the proportion equation
   42,488.89 : 63,693.47 = 14,389.27 : x
2. Step 2: Convert to fraction form
   42,488.89/63,693.47 = 14,389.27/x
3. Step 3: Cross multiply
   42,488.89x = 63,693.47 × 14,389.27
4. Step 4: Simplify right side
   42,488.89x = 916,502,413.81
5. Step 5: Solve for x
   x = 916,502,413.81/42,488.89
6. Step 6: Final answer
   x = 21,570.40