Finding the Fourth Proportional to 309,408.56, 464,180.88 and 99,067.76

Step by Step Solution

1. Step 1: Write the proportion equation
   309,408.56 : 464,180.88 = 99,067.76 : x
2. Step 2: Convert to fraction form
   309,408.56/464,180.88 = 99,067.76/x
3. Step 3: Cross multiply
   309,408.56x = 464,180.88 × 99,067.76
4. Step 4: Simplify right side
   309,408.56x = 45,985,360,016.43
5. Step 5: Solve for x
   x = 45,985,360,016.43/309,408.56
6. Step 6: Final answer
   x = 148,623.43