Finding the Fourth Proportional to 72,139.19, 108,174.72 and 42,162.03

Step by Step Solution

1. Step 1: Write the proportion equation
   72,139.19 : 108,174.72 = 42,162.03 : x
2. Step 2: Convert to fraction form
   72,139.19/108,174.72 = 42,162.03/x
3. Step 3: Cross multiply
   72,139.19x = 108,174.72 × 42,162.03
4. Step 4: Simplify right side
   72,139.19x = 4,560,865,789.88
5. Step 5: Solve for x
   x = 4,560,865,789.88/72,139.19
6. Step 6: Final answer
   x = 63,223.14