Finding the Fourth Proportional to 48,548.72, 72,817.79 and 13,013.53

Step by Step Solution

1. Step 1: Write the proportion equation
   48,548.72 : 72,817.79 = 13,013.53 : x
2. Step 2: Convert to fraction form
   48,548.72/72,817.79 = 13,013.53/x
3. Step 3: Cross multiply
   48,548.72x = 72,817.79 × 13,013.53
4. Step 4: Simplify right side
   48,548.72x = 947,616,247.59
5. Step 5: Solve for x
   x = 947,616,247.59/48,548.72
6. Step 6: Final answer
   x = 19,518.87