Finding the Fourth Proportional to 72,103.98, 99,503.70 and 40,274.10

Step by Step Solution

1. Step 1: Write the proportion equation
   72,103.98 : 99,503.70 = 40,274.10 : x
2. Step 2: Convert to fraction form
   72,103.98/99,503.70 = 40,274.10/x
3. Step 3: Cross multiply
   72,103.98x = 99,503.70 × 40,274.10
4. Step 4: Simplify right side
   72,103.98x = 4,007,421,964.17
5. Step 5: Solve for x
   x = 4,007,421,964.17/72,103.98
6. Step 6: Final answer
   x = 55,578.37