Finding the Fourth Proportional to 48,580, 72,868.72 and 13,518.24

Step by Step Solution

1. Step 1: Write the proportion equation
   48,580 : 72,868.72 = 13,518.24 : x
2. Step 2: Convert to fraction form
   48,580/72,868.72 = 13,518.24/x
3. Step 3: Cross multiply
   48,580x = 72,868.72 × 13,518.24
4. Step 4: Simplify right side
   48,580x = 985,056,845.45
5. Step 5: Solve for x
   x = 985,056,845.45/48,580
6. Step 6: Final answer
   x = 20,277.00