Finding the Fourth Proportional to 72,030.42, 99,401.76 and 40,199.04

Step by Step Solution

1. Step 1: Write the proportion equation
   72,030.42 : 99,401.76 = 40,199.04 : x
2. Step 2: Convert to fraction form
   72,030.42/99,401.76 = 40,199.04/x
3. Step 3: Cross multiply
   72,030.42x = 99,401.76 × 40,199.04
4. Step 4: Simplify right side
   72,030.42x = 3,995,855,326.31
5. Step 5: Solve for x
   x = 3,995,855,326.31/72,030.42
6. Step 6: Final answer
   x = 55,474.55