Finding the Fourth Proportional to 48,189, 72,287.28 and 13,130.04

Step by Step Solution

1. Step 1: Write the proportion equation
   48,189 : 72,287.28 = 13,130.04 : x
2. Step 2: Convert to fraction form
   48,189/72,287.28 = 13,130.04/x
3. Step 3: Cross multiply
   48,189x = 72,287.28 × 13,130.04
4. Step 4: Simplify right side
   48,189x = 949,134,877.89
5. Step 5: Solve for x
   x = 949,134,877.89/48,189
6. Step 6: Final answer
   x = 19,696.09