Finding the Fourth Proportional to 309,523.86, 464,255.55 and 99,105.30

Step by Step Solution

1. Step 1: Write the proportion equation
   309,523.86 : 464,255.55 = 99,105.30 : x
2. Step 2: Convert to fraction form
   309,523.86/464,255.55 = 99,105.30/x
3. Step 3: Cross multiply
   309,523.86x = 464,255.55 × 99,105.30
4. Step 4: Simplify right side
   309,523.86x = 46,010,185,559.42
5. Step 5: Solve for x
   x = 46,010,185,559.42/309,523.86
6. Step 6: Final answer
   x = 148,648.27