Finding the Fourth Proportional to 140,049.74, 210,168.04 and 72,643.98

Step by Step Solution

1. Step 1: Write the proportion equation
   140,049.74 : 210,168.04 = 72,643.98 : x
2. Step 2: Convert to fraction form
   140,049.74/210,168.04 = 72,643.98/x
3. Step 3: Cross multiply
   140,049.74x = 210,168.04 × 72,643.98
4. Step 4: Simplify right side
   140,049.74x = 15,267,442,894.40
5. Step 5: Solve for x
   x = 15,267,442,894.40/140,049.74
6. Step 6: Final answer
   x = 109,014.43