Finding the Fourth Proportional to 48,002.16, 72,004.86 and 12,942.12

Step by Step Solution

1. Step 1: Write the proportion equation
   48,002.16 : 72,004.86 = 12,942.12 : x
2. Step 2: Convert to fraction form
   48,002.16/72,004.86 = 12,942.12/x
3. Step 3: Cross multiply
   48,002.16x = 72,004.86 × 12,942.12
4. Step 4: Simplify right side
   48,002.16x = 931,895,538.70
5. Step 5: Solve for x
   x = 931,895,538.70/48,002.16
6. Step 6: Final answer
   x = 19,413.62